Material: ABS Size: 70*24*19mm Product Weight: 30g Battery: LR03-1.5V/AAA*2 Wi-Fi frequency: 2.4GHz IEEE 802.11 b/g/n Temperature Measure Range: -20°C ~ 60°C Humidity Measure Range: 0% RH ~ 100% RH Temperature Measure Accuracy: ±1°C Humidity Measure Accuracy: ±5% RH Specifications: Intelligent Linkage When the ambient environment changes, you can set up intelligent linkage. For example, the air conditioner will turn on and adjust to a specified temperature automatically when the room temperature exceeds 28°C. The humidifier will activate when the humidity is lower than 20% RH. Share Devices You can share your added devices with family members, so they can also monitor the ambient environment. Temperature Unit Selection in App You can choose Celsius or Fahrenheit as the temperature unit through the app. Third-party Voice Control Works with Alexa and Google Assistant. Low Battery Alarm The battery level can be monitored. Temperature and Humidity Changes View temperature and humidity change curves and historical data. Wall-mounted, Easy to Install Package Included: 1 x Temperature and Humidity Monitor 1 x Instruction Manual 3M Stickers