Description: Material : ABS Size: 70 x 24 x 19mm Product Weight: 30g Battery:LR03-1.5V/AAA x 2 Wi-Fi frequency: 2.4GHZ IEEE 802.11 b/g/n Temperature Measure Range: -20anddeg;C - 60anddeg;C Humidity Measure Range: 0% RH - RH Temperature Measure Accuracy: andplusmn;1anddeg;C Humidity Measure Accuracy: andplusmn;5%RH Specifications: [Intelligent Linkage] When the ambient environment change, you can do intelligent linkage. For example, the air conditioner will be on and turn to specified temperature automatically when the room temperature surpass 28℃. And the humidifier will spray when the humidity is lower than 20% RH. [Share devices] You can share your added devices with your family members, so they can also monitor the ambient environment. [Temperature Unit Selection in APP] You can choose ℃ or ℉ as the temperature unit through app. [ Third-party Voice Control] Works with amazon alexa, assistant. [Low battery alarm] The battery level can be monitored. [Temperature and humidity changes.] Temperature and humidity change curve, historical data. [Wall-mounted, easy to install] Package Included: 1 set x (1 temperature and humidity, 1 instruction manual, 3M stickers)