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Five and a half dollars a socket with 15 amps, FCC and ETL — and 2.4 GHz only

EIGHTREE ET01A-4

A four-pack of 15-amp smart plugs 1.2 inches thick, FCC and ETL certified, with SmartThings support.

EIGHTREE 15A smart plug, compact round white body

EIGHTREE ET01A-4

A four-pack of 15-amp smart plugs 1.2 inches thick, FCC and ETL certified, with SmartThings support.

Pack
4 plugs
Rating
15 A, 1,800 W
Thickness
1.2 in
Setup
Smart Life app, Bluetooth assisted; no hub
Ecosystems
Alexa, Google Home, SmartThings
Automation
Schedules, countdown timers, routines, group control
Certifications
FCC and ETL
Wi-Fi
2.4 GHz only
Matter
Not stated by the maker
Amazon reference
B0B2PFFDKF
EAN
0796520685741
  • The lowest price per plug on this shelf by a clear margin, with 15 A and 1,800 W published
  • Both FCC and ETL certification named, which only two other plugs here publish
  • 2.4 GHz only, and the listing says so with an exclamation mark — the same maker’s dual-band plug on this shelf costs nearly twice as much per plug

Best for: Four appliances in an Alexa or Google house, at the lowest cost per socket on this shelf

≈ $25
Check price on Amazon

Specifications

Pack
4 plugs
Rating
15 A, 1,800 W
Thickness
1.2 in
Setup
Smart Life app, Bluetooth assisted; no hub
Ecosystems
Alexa, Google Home, SmartThings
Automation
Schedules, countdown timers, routines, group control
Certifications
FCC and ETL
Wi-Fi
2.4 GHz only
Matter
Not stated by the maker
Amazon reference
B0B2PFFDKF
EAN
0796520685741

What the maker puts in writing

  • 4 plugs · 15 A / 1,800 W · 1.2 in thick
  • Smart Life app, Bluetooth setup, no hub
  • Alexa, Google Home, SmartThings
  • Schedules, countdown timers, routines, group control
  • FCC and ETL certified · 2.4 GHz only

Five and a half dollars a socket

That is the lowest figure on this shelf, and it comes with the rating that matters: fifteen amps, eighteen hundred watts, enough for the heaters and air conditioners this site is about.

Two plugs here cost more per socket and publish no amperage whatsoever.

The exclamation mark

Note: 2.4GHz WiFi Only!

Six plugs on this shelf carry some version of that warning, several in capitals. It is the category’s standing problem, and this maker’s own ET05 is the only product here that fixes it.

Availability

Read on the day this page was built: $25 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-04. The live price is at the top of the page.

The questions that keep coming up

Will it run my space heater?

Fifteen amps and 1,800 watts, published, and the listing names heaters explicitly. A 1,500 W heater draws about 12.5 amps. The two cheapest single plugs on this shelf publish no rating at all, and that is the figure to check before plugging in anything that heats.

Is 2.4 GHz a problem?

Only during setup, and only on a router that merges both bands under one name — which is most modern routers. If that has caught you before, the same maker’s ET05 on this shelf is the dual-band answer at roughly double the price per plug.

What does SmartThings add?

A third ecosystem, so the plugs can be driven from a Samsung hub as well as from Alexa or Google. Three plugs on this shelf name SmartThings; this is the cheapest of them.

More smart plugs & timers

  • GHome smart plug in white, square body with single socket

    GHome Smart WP3

    A single smart plug on Bluetooth or 2.4 GHz Wi-Fi, with cyclical and random schedules and group control.

    Connection
    Bluetooth or 2.4 GHz Wi-Fi — 2.4 GHz only
    Apps
    GHome, Smart Life and Tuya
    Voice
    Alexa and Google Assistant, after linking in the GHome app
    Automation
    Timers and schedules, cyclical or random
    Group control
    Yes, plus sharing with family members
    Amperage
    Not stated by the maker
    Wattage
    Not stated by the maker
    Certification
    Not stated by the maker
    Matter
    No
    Amazon reference
    B0D7ZXYPRL
    EAN
    0199284513457
    • The lowest price on this shelf for a single plug
    • Cyclical and random schedules, which only this plug and its Matter sibling here publish
    • No amperage and no wattage published, so it should not be trusted with a space heater

    Best for: A lamp, a Christmas tree or a humidifier, where ten dollars and a schedule are the whole requirement

    ≈ $10
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  • Kasa Smart Wi-Fi plug HS103 two-pack in white

    Kasa Smart HS103

    A two-pack of UL-certified HS103 smart plugs rated 15 amps resistive, each with a side button.

    Pack
    2 plugs
    Maximum load
    15 A resistive at 120 V AC — stated for the new version
    Certification
    UL certified
    Control
    Button on the side of each plug, plus the Kasa app
    Voice
    Alexa and Google Assistant
    Wi-Fi
    2.4 GHz only
    Automation
    Timer and countdown schedules
    Origin
    Designed and developed in Silicon Valley
    Matter
    Not stated by the maker
    Amazon reference
    B07B8W2KHZ
    EAN
    0840460604925
    • A physical button on each plug, shared only with its own four-pack on this shelf
    • The only listing here that qualifies its load rating — 15 A resistive, at 120 V AC — rather than quoting a round figure
    • The load rating is footnoted as applying to the new version, so an older unit may differ

    Best for: Two lamps or fans, where the manual button and the UL mark are the deciding factors

    ≈ $15
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  • Kasa Smart Wi-Fi plug HS103 in white with side button

    Kasa Smart HS103P4

    A four-pack of UL-certified 15-amp smart plugs with a physical button on each, controlled by the Kasa app.

    Pack
    4 plugs
    Rating
    15 A
    Certification
    UL certified
    Control
    Touch actuator on each plug, plus the Kasa app
    Voice
    Alexa, Echo and Google Home; no hub required
    Wi-Fi
    2.4 GHz only
    App support
    Android 5.0 or higher, iOS 10.0 or higher
    Automation
    Timer and countdown schedules
    Matter
    Not stated by the maker
    Amazon reference
    B07RCNB2L3
    EAN
    0840030702174
    • A physical button on every plug, so a lamp can be switched without a phone or a network
    • UL certified — the strictest named certification on this shelf — and 15 amps published
    • 2.4 GHz only, like six of the eight plugs on this shelf

    Best for: Four lamps or fans where a manual override matters as much as the app

    ≈ $34
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Elsewhere in the spares drawer

  • GoveeLife 2-in-1 indoor outdoor thermo-hygrometer with lanyard and LCD display

    GoveeLife H5171011

    An indoor-outdoor thermo-hygrometer accurate to ±0.54 °F and ±3% RH, rated IP65, with twenty-day curves and app alerts.

    Accuracy
    ±0.54 °F / ±3% RH
    Sampling
    Every 2 seconds
    Protection
    IP65 — rain and moisture, dustproof and sun-resistant; not for immersion
    Weight
    2.39 oz
    Battery
    Up to one year in Bluetooth mode
    Alerts
    Preset temperature and humidity thresholds, pushed to the app
    Data
    20-day curve readings; 2 years of free storage and export
    Mounting
    Nylon lanyard with adjustable buckle; hangs indoors or out
    Display
    LCD with a humidity comfort indicator, no ghosting
    Gateway
    Connects to GoveeLife gateways for remote monitoring
    Amazon reference
    B0FLQD2PC9
    EAN
    0810127738966
    • The tightest published accuracy on this shelf — ±0.54 °F and ±3% RH — and the fastest sampling at two seconds
    • The only device here with an ingress rating, IP65, so it works on a patio or a backpack
    • The alerts and the history need the app: on the device itself you get the current reading and a comfort icon

    Best for: A patio, greenhouse or backpack, or any room where you want the history rather than the moment

    ≈ $21
    Check price on Amazon
  • General Tools RHMG650 9-in-1 thermo-hygrometer and moisture meter with backlit LCD

    General Tools RHMG650

    A nine-function instrument combining a thermo-hygrometer with a pin and pinless moisture meter, recalling twenty reading pairs.

    Measurements
    9, including humidity, dew point and vapor pressure
    Moisture meter
    Pin and pinless
    Temperature range
    −20 to 167 °F
    Memory
    Recalls 20 reading pairs
    Display
    Large backlit LCD
    Accuracy
    Not stated by the maker
    Refresh rate
    Not stated by the maker
    Calibration
    Not stated by the maker
    Amazon reference
    B00I140G2E
    EAN
    0681035016084
    • The only instrument on this shelf with a pin and pinless moisture meter, which reads moisture inside timber and plaster rather than in the air
    • Publishes dew point and vapor pressure, which only one other instrument here does
    • Two bullets: no accuracy, no humidity range, no refresh rate, no calibration statement

    Best for: Building and restoration work, where moisture in a material matters more than comfort in a room

    ≈ $220
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  • LittleGood 6-inch analog wall thermometer and hygrometer with white ABS case

    LittleGood HMTMHY-WT

    A 5.9-inch analog dial reading −30 to +50 °C (122 °F) and 10 to 100 per cent humidity, with a calibration screw on the back.

    Type
    Analog — no batteries
    Dial
    5.9 in / 15 cm diameter, large black numerals
    Temperature
    −30 to +50 °C (122 °F) / −20 to +120 °F, accuracy ±2 °C (36 °F) / ±3.6 °F
    Humidity
    10 to 100%, accuracy ±5%
    Calibration
    Adjustment screw on the back for the temperature
    Scales
    Both Fahrenheit and Celsius, color-coded dial
    Mounting
    Supplied stand, or wall mounting hole
    Case
    White ABS
    Refresh rate
    Not applicable — analog
    Amazon reference
    B09P37W7CY
    EAN
    0613965381178
    • The only analog instrument on this shelf that publishes both tolerances and includes a calibration screw
    • A 5.9-inch dial with large numerals, readable across a room, which no digital display here matches for size
    • ±2 °C (36 °F) is the loosest temperature tolerance published on this shelf

    Best for: A wall in a garage, porch or workshop, read from across the room, with no battery to change

    ≈ $14
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All smart plugs & timers