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: -20C ~ 60C Humidity Measure Range: 0% RH ~ 100% RH Temperature Measure Accuracy: 1C Humidity Measure Accuracy: 5% RH Specifications: Intelligent Linkage When the ambient environment changes, intelligent linkage can be triggered. For example, the air conditioner will turn on and adjust to a set temperature automatically when the room temperature exceeds 28C. The humidifier will activate when humidity drops below 20% RH. Share Devices You can share added devices with family members so they can also monitor the ambient environment. Temperature Unit Selection in App You can choose between Celsius and Fahrenheit as the temperature unit through the app. Third-party Voice Control Compatible with Alexa and Google Assistant. Low Battery Alarm Battery level can be monitored via the app. Temperature and Humidity Changes View temperature and humidity change curves and historical data in the app. Wall-mounted Design Easy to install with wall-mounting option. Package Included: 1 x Temperature and Humidity Monitor 1 x Instruction Manual 3M Stickers