Description: Input voltage:DC4.5V LR03*3 WiFi:802.11b/g/n 2.4GHz Working temperature:-10~55 Working humidity:10%~90%RH Specifications: 1. Intelligent Linkage When the ambient environment change, you can do intelligent linkage. For example, the air conditioner will be on automatically when the room temperature surpass 35. And the humidifier will spray when the humidity is lower than 20% RH. 2. Share devices You can share your added devices with your family members. 3. Screen on Sensor You can do real-time monitor the temperature and humidity on the screen directly. 4. Temperature Unit Selection in APP You can choose or as the temperature unit through app. 5. Third-party Voice Control Works with amazon alexa, google assistant. Package Included: sensor*1 Manual *1