What Is a Smart Plug and What Can You Use It For

You’re already in bed when you remember the living room lamp is still on. So, what is a smart plug? It’s a small adapter you put between a wall outlet and a device so you can switch its power from an app, with your voice or on a schedule.

That lamp is a good place to start. Leave its own switch on and you can turn it off from your phone without getting out of bed. You can even tell the plug to take care of it at bedtime tomorrow.

Here’s the catch. A smart plug can give your coffee maker power, but it can’t press Brew for you. A machine that starts as soon as it gets power is a better fit than one that waits for you to pick a brew mode.

So where do you start? We’ll go through how the plug works, what to look for when you buy one and how to connect it to Alexa, Google Home or Apple Home. Then you can decide what you’d like to put on a schedule, what should stay plugged into the wall and whether there’s any electricity worth saving.

What a Smart Plug Is and How It Works

What happens when you tap the on button in an app? A radio inside the plug receives your command, and a part called a relay restores power to the socket. When you tell the plug to turn off, the relay cuts power again.

You see, those are the two things the relay can do. Your plug can switch a lamp off, but it can’t dim the bulb. If you’re standing next to the outlet, you can also use the physical button on the plug.

The connection is what changes from one model to the next. Some plugs connect directly to your Wi-Fi router, while others need a hub or a device called a Thread border router.

Connection Type	Do You Need a Hub?	Example
Wi-Fi	A standard Wi-Fi plug can connect directly to your router. The Wi-Fi models here use 2.4 GHz.	Kasa EP25
Bluetooth	No hub for direct Bluetooth control. Some Wi-Fi plugs use Bluetooth just for pairing.	Philips Hue Smart Plug for direct control or Tapo P125M for pairing only
Zigbee or Z-Wave	Yes. Both use a low-power mesh and connect through a compatible hub or bridge.	Aqara Smart Plug US version with an Aqara Hub over Zigbee
Thread	You need a Thread border router, which passes traffic between the Thread mesh and the rest of your home network.	Eve Energy
Matter	You need a Matter controller. Whether that has to be a separate hub depends on your home platform. Matter runs over Wi-Fi or Thread and uses Bluetooth LE for pairing.	Tapo P125M over Wi-Fi

The Kinds of Smart Plugs You Can Buy

Start with what you want the plug to do. A mini indoor plug makes sense for a single device where outlet space is tight, while a plug with energy monitoring lets you check how much electricity that device uses. Those features can overlap, so one compact plug can also support Matter or track energy use.

The prices below were seen on November 9, 2026, and prices change. Check the pack size as well as the price, especially if you’re comparing a single plug with a multipack.

Type	Best For	Example and Price Seen November 9, 2026
Indoor smart plug	Controlling one device indoors	Wyze Plug at $29.98 for two or $59.96 for four. The two-pack may have been unavailable.
Energy-monitoring plug	Checking how much electricity an appliance uses over time	Kasa EP25P4 at $39.99 for four, down from $49.99 in the same listing
Matter plug	Adding a plug to a home platform that supports Matter	Tapo P125M listed at $11.99. The listing was unclear about how many plugs that price covered, and the three-pack was sold out.
Zigbee or Bluetooth plug	Adding a plug to your Philips Hue setup	Philips Hue Smart Plug at $39.99. Voice control and Matter support require the Hue Bridge.
Outdoor smart plug	Switching patio string lights or outdoor decor	Wyze Plug Outdoor at $29.98 for one or $57.98 for two
Smart power strip	Controlling several devices from one strip	Kasa HS300

Taking your plug outside? The Kasa EP40 and Wyze Plug Outdoor both carry an IP64 rating and are rated down to 4°F below zero. The Kasa model is rated up to 122°F and the Wyze up to 120°F. By comparison, the IP20 Philips Hue Smart Plug has no moisture protection.

How to Set Up a Smart Plug

Before you start, have the app you’ll use and your network details ready. If you’re pairing one of the Wi-Fi models above, make sure your network supports 2.4 GHz. If a wall switch controls your outlet, leave the switch on so the plug has power during setup.

If pairing keeps failing, see what to do when a smart plug won’t connect to WiFi.

Pairing a Wyze Plug? On iOS 13 or later, turn on Location Services for setup. On Android, accept the prompt that says there’s no internet when it appears during pairing.

Pair the Amazon Smart Plug in Alexa

Use this path for the Amazon Smart Plug. If you’re adding a Matter plug instead, a supported Echo can handle Matter pairing in Alexa.

1. Insert the Amazon Smart Plug into the wall outlet.
2. Open the Alexa app and select Devices.
3. Select Add Device, then Plug.
4. Follow the prompts to finish pairing.

Once the plug appears in Alexa, switch it on and off from the app. That gives you a way to check that it responds before you try controlling it by voice.

Add a Matter Plug in Google Home

Google Home requires a Matter-enabled hub. For setup, use a phone running Android 8.1 or later or iOS 16.5 or later, with Bluetooth LE 4.2 or later.

Here’s the catch. Your router needs IPv6 enabled. With IPv6 off, the plug can appear to pair successfully and then fail to respond when you try to control it.

1. Open the Google Home app.
2. Tap Add, then Device.
3. Scan the plug’s Matter QR code.
4. Pick a room and give the plug a name.

Add a Matter Plug in Apple Home

On iOS 18 or later, you can add and control Matter accessories without a home hub, though Apple recommends one. If you buy a Thread plug, check for a Thread-capable hub or border router. Supported iPhones starting with iPhone 15 Pro can connect to Thread accessories directly.

1. Open the Home app and tap the plus button.
2. Choose Add Accessory.
3. Scan the Matter code or hold your iPhone near the accessory. On the Tapo P125M, the code is printed on the plug.

If the plug later shows No Response, our HomeKit no response fixes can help.

Want to find the plug after pairing? Open Settings → General → Matter Accessories on your iPhone. Paired Matter accessories sync through iCloud Keychain.

What You Can Use a Smart Plug For

Think about the small things you do on repeat. You switch on a lamp when it gets dark, turn off your desk gear when you’re done and go outside to unplug the patio lights. A smart plug can take over the timing for each of those jobs.

Which use should you try first? Pick something you already switch on and off by hand. These eight ideas give you a place to start, from putting one lamp on a schedule to controlling several devices together.

1. Turn Lamps On at Sunset and Off at Bedtime

A table or floor lamp with a manual switch is a good fit. Leave the lamp’s switch on so it lights up whenever the plug restores power. The plug handles the timing, and the bulb comes on at its usual brightness.

Here’s the handy part. Kasa’s Sunset option lets you tie the start time to dusk instead of picking a fixed hour. You can still set a fixed bedtime for the lights to go out.

How to Set It Up

1. Connect the lamp to your Kasa plug and leave the lamp’s switch on.
2. Open the plug in the Kasa app and choose Schedule.
3. Select Sunset for the event that turns the lamp on.
4. Add a second event using Custom Time to turn the lamp off at bedtime. Choose the repeat days for each event.

2. Control Everyday Devices With Your Voice

Ever get comfortable on the couch and realize the lamp across the room is still on? With a compatible plug, you can ask Alexa, Google Assistant or Siri to switch it for you. It’s especially handy when the socket is hard to reach.

If Alexa ignores you, try our Alexa not responding fixes. Give the plug a name you’ll remember when you say it out loud. If you have lamps in several rooms, naming each plug for its room gives your assistant a specific one to control.

How to Set It Up

1. Add the compatible plug to the home app you use with your voice assistant.
2. Give the plug a distinct name based on the room or device.
3. Ask your assistant to turn the named plug on, then off, to check that it controls the right socket.

3. Make Your Home Look Lived In While You’re Away

You can leave an indoor lamp on a fixed schedule while you’re away. If you’d prefer the timing to vary, Kasa’s Away Mode switches the lamp on and off at random within a window you choose. The indoor Wyze Plug also offers a vacation mode.

Start with a lamp in a room you normally light in the evening. Set the window for the hours when you want the room to look occupied.

How to Set It Up

1. Open the lamp’s plug in the Kasa app and select Away Mode.
2. Set the start and end times for the window.
3. Enable Away Mode before you leave.

4. Have Small Appliances Ready When You Wake Up

Want your coffee to start brewing before you get out of bed? A simple coffee maker that starts as soon as it receives power can work for this. If your machine waits for you to choose a brew mode, you’ll still need to do that yourself.

Check the coffee maker’s manual and the plug’s load rating before you set up an automatic start. If the appliance suits the job, use a schedule for a recurring start or Kasa’s Timer for a one-time countdown.

How to Set It Up

1. Check that the coffee maker starts when power returns, that its manual allows the intended use and that its load fits the plug’s rating.
2. For a recurring start, set the plug to switch on at the time you want brewing to begin.
3. For a one-time start, open the plug in Kasa, choose Timer and set the countdown to turn it on.

5. Cut Standby Power on Your TV and Desk Gear

Your TV can still draw electricity in standby after you turn it off. A smart plug can cut power at the outlet after you’ve finished watching. You can do the same for suitable desk gear once you’ve shut it down for the day.

Here’s the catch. When power returns, your TV may go back to standby and wait for you to use the remote. Think of the plug as a way to cut standby power after you’re done.

How to Set It Up

1. Choose a TV or desk accessory that draws standby power and fits the plug’s rating.
2. Shut down the equipment as you normally would.
3. Switch the plug off in the app, or schedule the cutoff for after you’re done using the equipment.

6. Measure How Much Power an Appliance Uses

Want to know what an appliance draws while it’s running? An energy-monitoring plug such as the Kasa EP25 or KP125M gives you a live power reading. The history view shows how much electricity the appliance used over time.

Check for energy tracking when you buy. The indoor Wyze Plug tracks run time, which tells you how long something was on. The Wyze Plug Outdoor offers energy history and lets you set usage alerts.

How to Set It Up

1. Connect one appliance to a plug with energy monitoring and check that its load fits the plug’s rating.
2. Open the plug’s energy view and check the live power reading while the appliance runs.
3. Return to the usage history after you’ve used the appliance as usual. Compare the totals across the periods you want to check.

7. Run String Lights and Outdoor Decor on a Schedule

Patio string lights are a good job for an outdoor-rated plug. Set the hours you want them on and you can leave them connected without heading outside to switch them each evening.

Have two sets of lights? The Kasa EP40 has two sockets that share a 15 A maximum. Check the total load across both before you connect the lights.

How to Set It Up

1. Choose an outdoor-rated plug and check the total load of the lights or decor you plan to connect.
2. Connect the lights and open the plug in its app.
3. Set the evening on and off times, then choose the days you want them to repeat.

8. Link Plugs to Routines, Scenes and Other Devices

Once you have a few plugs, you can give several devices the same job. For example, you could have multiple lights come on together in an evening scene. An Aqara smart plug can take part in scenes with other Aqara devices.

In Kasa, Smart Actions lets you set up schedules for multiple devices. You can also use Delay Action for an automatic shutoff after a wait. Keep in mind that Kasa Smart Actions need an internet connection. If a routine stops firing, our Google Home automations guide covers the common causes.

How to Set It Up

1. In the Kasa app, open Smart → Smart Actions.
2. Choose the plugs you want to control together and set what each should do.
3. If you want an automatic shutoff after a wait, set up an auto-off Smart Action using Delay Action.

What to Keep Off a Smart Plug

Before you plug anything in, check the appliance manual and the rating on the smart plug. Look at watts and amps, then check horsepower if the appliance has a motor. A plug can have different limits for different kinds of equipment.

Read the Load Rating and Look for UL or ETL

You’ll often see a US smart plug rated for 15 A or 1,800 W at 120 V. Look closer, though. The Leviton D215P lists 15 A for general use, 5 A for LED or CFL lighting, 1,500 W for incandescent or halogen lighting and ¾ HP for motors.

For continuous use, TP-Link advises keeping the connected load at or below 80 percent of the plug’s maximum. On a plug rated for 1,800 W, that gives you a continuous load limit of 1,440 W under that guideline. Look for UL or ETL certification when you buy, and use verify.ul.com if you want to check a UL listing.

Keep Space Heaters and Large Motors Off the Plug

Can a 15 A smart plug handle a 1,500 W space heater? At 120 V, that heater draws 12.5 A, or about 83 percent of the plug’s maximum. It falls below the stated maximum and still exceeds TP-Link’s 80 percent guideline for continuous use.

Here’s where the guidance can seem to pull in different directions. TP-Link’s FAQ includes heaters among the resistive loads its plugs are designed for. The US Consumer Product Safety Commission advises plugging a portable heater snugly into a wall outlet and warns against extension cords and power strips. The Vornado VH202 manual also warns that an automatic timer may defeat the heater’s thermal cutout, so keep a portable space heater plugged directly into the wall and follow its manual.

Motor loads have a different catch. A refrigerator, air conditioner or washing machine can draw a surge at startup. TP-Link’s general guidance excludes motor loads above 1 HP, and individual plugs can have much lower limits. The Tapo P125M and Kasa EP25, for example, are each rated for motors up to ⅙ HP.

Leave Critical Equipment and EV Charging on Their Own Power

Keep medical equipment, security systems and garage door equipment off a smart plug. Even when the equipment fits the plug’s electrical rating, an accidental shutoff could cut power when you need it.

Keep your EV charger off the smart plug, too. TP-Link lists EV charging among the uses its smart plugs do not support.

What Still Works When Your Smart Plug Goes Offline

What went down? Your Wi-Fi, your internet service and the electricity at the outlet are three different things. What you can still control depends on which one you’ve lost and where the plug runs its schedules.

When Wi-Fi or the Internet Goes Down

If a Wi-Fi plug drops off your home network, you lose the app connection to it. As long as the outlet still has power, you can use the physical button on a model such as Eve Energy to switch it at the socket.

If your home network is still up and only the internet is down, Matter can handle control locally. To control a Matter-only plug while you’re away, you need a Matter controller that can reach the internet.

Schedules depend on the model and the feature. Eve says its schedules can run without your phone or an internet connection. TP-Link staff said in 2019 that Kasa plugs save schedules in the plug’s memory, though user reports describe mixed results. Kasa’s separate Smart Actions feature needs an internet connection. If your plug keeps dropping, here’s how to get a Kasa smart plug back online.

When the Electricity Comes Back

D-Link says its plugs return to their last on or off state after an outage. TP-Link staff described similar behavior for Kasa, while a 2020 user report said the result varied across Kasa models.

Check how your specific plug restarts before you count on it to bring a device back on. That detail matters if you expect a lamp or another scheduled device to pick up where it left off.

When a Company Closes Its Cloud Service

Insteon shut down its cloud service without warning on April 14, 2022. Basic local controls and timers stored on the hub continued to work, while the app became largely unusable and firmware updates stopped.

If you’re buying a plug with a particular feature in mind, check where that feature runs. A timer stored on the plug or hub can keep working when the maker’s servers go away, as Insteon’s hub timers did.

Matter, Thread and Energy Monitoring Before You Buy

A Matter logo can help you find a plug that works with your home platform. You still need to check what equipment the platform requires and where you’ll be able to see your energy readings.

Match the Plug to Alexa, Google Home or Apple Home

Start with the gear you already have. A speaker or display may already handle Matter, and some models also act as Thread border routers.

Platform	What You Need	Examples
Alexa	A supported Echo can handle Matter pairing and act as the Matter administrator.	Echo and Echo Dot from the second generation onward, Echo Hub, Echo Pop and supported Echo Show models
Google Home	Google requires a Matter-enabled hub. For a Thread plug, check for Thread border router support as well.	Nest Audio, Nest Mini and the first-generation Nest Hub for Wi-Fi Matter. The second-generation Nest Hub, Nest Hub Max, Nest Wifi Pro and Google TV Streamer (4K) also support Thread.
Apple Home	With iOS 18 or later, you can add and control Matter accessories without a home hub, though Apple recommends one.	Apple home hubs include HomePod, HomePod mini and Apple TV. Check Thread support on your hub or look for direct support on a compatible iPhone, starting with iPhone 15 Pro.

What if you use more than one home app? Matter’s multi-admin feature lets you choose which platforms can access the same plug. Look for the Matter logo to identify a certified device. If a plug drops off later, our Matter device offline fixes cover Google Home and Apple Home.

Tell Matter Support Apart From Thread Support

Eve Energy and the Tapo P125M both support Matter, but they connect in different ways. Eve Energy uses Thread and needs a way onto your home network through a Thread border router. The Tapo P125M uses Wi-Fi, so it can use Matter without a Thread border router.

If you use both Apple and Google gear, their hubs may create separate Thread networks. In a December 2025 account, one writer reported that their Thread devices went offline every few days before they changed border routers. That was one setup, so use it as a detail to check if you run into a similar problem.

If you’re comparing version numbers, Matter 1.6 arrived on June 17, 2026. It added NFC pairing and Joint Fabric, which lets several controllers manage one network together. Matter 1.6.1 followed in September as a maintenance release with no new device types.

Know When Energy Readings Get Less Reliable

First, check where you can see the numbers. Eve says you can view readings in its app or through a supported platform energy feature. A user report about Eve and Meross plugs described needing the makers’ apps to see energy data, so check what your own platform can display.

A May 2026 test compared the Tapo P110M with an ION9000 reference meter. Its power readings generally had 1 to 2 percent error above 100 mA, and power error reached 10 percent at 10 mA. The current reading at 10 mA was off by about 1,000 percent. The tester advised treating current readings below about 1 A with caution.

Results vary by model and load. In an August 2026 Home Assistant user report, a Shelly Plug Gen3 read 0.02 percent high against a calibrated meter, while an Innr SP240 read 3.2 percent high on a cooker and 12.6 percent high on a combi oven. Lawrence Berkeley National Laboratory also says relative error grows below about 1 W on home meters. Use a monitoring plug to spot larger draws and treat tiny standby readings as estimates.

When a Smart Plug Can Save Energy and Money

Can a smart plug lower your bill? Yes, if the power it cuts is greater than the power it uses. The US Department of Energy estimates that standby power makes up 5 to 10 percent of the energy used in US homes and can cost the average US household as much as $100 a year. That figure covers standby across the home.

The plug itself draws power, too. Amazon lists 0.23 W for its Smart Plug in Off Mode and 0.88 W in Networked Standby. At the US Energy Information Administration’s August 2026 residential average of 18.16 cents per kWh, a constant draw of 0.88 W works out to about 7.7 kWh, or $1.40 a year.

Start with gear that spends hours in standby or that you often forget to turn off. A device you already switch off when you’re done may leave little room for savings. Energy Star suggests smart plugs for small appliances such as coffee makers and points to smart thermostats for a larger opportunity, since the average US household spends more than $900 a year on heating and cooling.

Smart Plugs, In-Wall Outlets, Wall Switches and Power Strips

Where do you want control? If you want to switch a device that plugs into the wall, you can use a plug-in adapter. For a hardwired light or a row of desk accessories, compare what a wall switch or smart power strip can control and what you’ll need to install it.

Option	What You Control	Wiring and Appearance	Example
Smart plug	A device connected to an existing socket	No wiring. The adapter stays visible and may cover a neighboring socket.	An indoor mini plug for one lamp
Smart in-wall outlet	The receptacles in a replacement outlet	Hardwired, with the appearance of a regular wall outlet	Retailers list the two-socket Kasa KP200 as requiring a neutral wire.
Smart wall switch	A hardwired fixture, such as an overhead light	Replaces your wall switch. Check for a neutral wire before buying.	Leviton Decora Smart Wi-Fi DW and D2 models need a neutral. Its no-neutral DN models need the MLWSB Wi-Fi Bridge and an earth ground.
Smart power strip	Several devices connected to one strip	Plugs into an existing outlet. The strip shares one total load limit.	The Kasa HS300 has six individually controlled outlets, three USB ports, per-outlet energy tracking and surge protection. Its total rating is 15 A or 1,875 W at 125 V.

When you compare prices, count the sockets or fixtures you actually want to control. Include any wiring or bridge the option requires before you compare it with a plug-in model.

Smart Plug Prices and Which One to Pick

If you only need one plug, start with the platform and device you already use. If you want to monitor several appliances, compare the pack size before deciding which listing suits you. These prices were seen on November 9, 2026, and prices change.

If You Want	Model	Price Seen November 9, 2026	What to Check
A single plug for Alexa	Amazon Smart Plug	$24.99 for one at Best Buy	Pick it if you use Alexa and only need one plug.
Matter and energy tracking for several devices	Tapo P110M	$35.99 for four at the Tapo store	Pick the four-pack if you want to track several devices separately.
A plug for an existing Thread setup	Eve Energy	$35.82 at Staples	Staples showed it out of stock. Eve’s own listing showed no price.
A plug with separate ratings by load type	Leviton Decora Smart Wi-Fi Mini Plug-In Switch D215P	$24.99 at the Leviton store	Match the appliance to the rating for its load type.

Keeping Your Smart Plug Secure

Start with the account and the plug itself. The Federal Trade Commission advises changing default usernames and passwords, using two-factor authentication where available and disabling features you don’t use. Keep the plug’s firmware up to date, and disconnect it once it stops receiving security updates.

Check which features depend on the maker’s cloud and which run locally. If you’d prefer a plug without a vendor account, Eve says Eve Energy needs no registration or subscription and uses no Eve cloud service.

You may eventually see a US Cyber Trust Mark on connected products. The FCC named the ioXt Alliance as lead administrator on April 13, 2026, and the planned label includes a QR code you can scan for security information. As of October 28, 2026, labeled products had yet to reach stores, and as of November 9, 2026, no smart plug carried the label.

FAQs

Final Word

Start with one job you’d like to stop doing by hand. If you keep remembering the living room lamp after you’ve gone to bed, try giving that lamp a bedtime schedule.

Choose a plug that works with the home app you already use and fits the lamp’s load. Put it somewhere you can easily reach if you need to reset or remove it, then try the schedule for a few evenings before you add more plugs.