When the ambient environment change, you can do intelligent linkage. For example, the 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. You can share your added devices with your family members, so they can also monitor the ambient environment. You can choose or as the temperature unit through app. Works with amazon , google assistant. color: White material: plastic The battery level can be monitored. Temperature and humidity change curve, real-time historical data. Wall-mounted, easy to install. Set the maximum temperature or minimum temperature reminder, once this value is reached, the phone will receive a notification. Specifications: Product name: Temperature and humidity sensor Battery type:2 x AAA(NOT INCLUDE) Input voltage: DC3V LR03 Quiescent current: Less than 95uA Alert current: Less than 135mA Low voltage: Less than 2.4V WIFI:802.11b/g Temperature detect range: -10C~ 55C Humidity detect range: 0-99%RH Installation: wall-mounted Working temperature: -10C~ 60C Working humidity: MAX 90%RH Package Contents: 1 x Temperature Humidity Sensor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store