SwitchBot W3400012 Wireless Hygrometer Thermometer, 2 Pack

Pack: The SwitchBot W3400012 wireless hygrometer thermometer is a two-unit temperature and humidity monitoring set. Its listing claims IP65 dust and water resistance for indoor or outdoor use, while customer feedback reports mixed Bluetooth connectivity experiences.

At a glance

The listing describes IP65 dustproof and waterproof protection for indoor and outdoor placement, including rainy-day use.
Two meters are listed, with example uses including kitchens, bathrooms, greenhouses and refrigerators.
The title claims 100m Bluetooth range, two-year battery life and free data storage. These are listing claims, not independently verified performance.

Price

£18.02Save 40%

Reference price: ~~£29.99~~

Price checked: 12 Nov 2026

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Often bought together

SwitchBot WiFi Weather Stations with Outdoor Sensor Wireless UK, Temperature Humidity Monitor with Date and Weather Forecast, Matter Hub Makes Station Work with Alexa, Apple Homekit, Google Home

£39.99

Pros and cons

Pros

A two-meter set can monitor conditions in two locations.
The claimed IP65 protection broadens the stated use beyond indoor rooms.
Customer feedback reports easy setup, portability and temperature readings that users found accurate.

Technical specifications

9 specifications

Identity
Brand	SwitchBot
Model	W3400012

Dimensions and installation
Dimensions listed	28W x 60H millimetres

Construction and power
Colour	White
Battery type	Alkaline
Upper temperature rating	50 Degrees Celsius

Measurement
Temperature accuracy	0.2

Pack and listed contents
Number of items	2
Included components	2Outdoor Meter, User Manual, 4AAA (built-in), 2*lanyard

What to know before buying

The title claims 100m Bluetooth range, two-year battery life and free data storage, but the supplied technical details do not confirm their conditions or operating requirements. Bluetooth feedback is mixed, so consider whether the connection suits the placement and monitoring distance you need. The listing gives temperature accuracy as “0.2” without a unit in the supplied details.

What’s in the box

Included

2 outdoor meters
User manual
4 AAA batteries, built-in
2 lanyards

Who is it for?

A good fit for

Buyers wanting temperature and humidity monitoring in two locations, including stated indoor and outdoor settings.
People looking for a portable meter for spaces such as a greenhouse, refrigerator or bathroom.

Less suited to

Buyers who require confirmed Bluetooth performance at a particular distance or need a clearly specified temperature-accuracy unit.

SwitchBot W3400012 Wireless Hygrometer Thermometer, 2 Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 10,495 ratings

5 stars71%71%
4 stars13%13%
3 stars6%6%
2 stars4%4%
1 star6%6%

Customer feedback describes the meter as easy to use and portable, with users reporting accurate temperature readings and the ability to track changes over time. That could suit monitoring separate locations, as the listing describes a two-meter set. Bluetooth experiences are mixed, which matters if you need consistent remote readings.

Positive themes

Customers report ease of use and portability.
Customers report accurate temperature readings and tracking changes over time.

Mixed feedback

Bluetooth connectivity receives mixed feedback, with reports of both trouble-free use and connection issues.

Frequently asked questions

Can these meters be used outdoors?

The listing describes them as IP65 dustproof and waterproof and suitable for indoor and outdoor use, including rainy days. This is a listing claim rather than independently verified performance.

What comes in the package?

The listed contents are two outdoor meters, a user manual, four built-in AAA batteries and two lanyards.

Is the stated Bluetooth range guaranteed?

The title claims a 100m range, but the supplied details do not specify the conditions for that figure. Customer feedback reports both trouble-free use and connectivity issues.