Features: Low advantage design to ensure long-term battery life. The built-in high-precision digital sensor can quickly and accurately find the temperature and humidity changes. Download APP on your phone&Tablet to control the wifi remote control and check temperature/humidity date. The temperature and humidity sensor can be linked with other for smart devices in the home to improve the indoor heating and cooling, and make your home more comfortable. The LCD screen dynamically displays real-time values, conveys the comfortable state of the home environment, is connected with for gateway and cloud platform, and the mobile APP can view current and historical temperature data. Specifications: Material: ABS Size: Approx. 7x7 for cm/2.76x2.76 in Battery: LR6 AM-3 1.5Vx3(Not included in the package) Standby current: ≤30uA Working current:＜100mA Low-battery remind function WiFi: 802.11b/g/n, 2.4GHz Measurement Range(temperature): -9℃~99℃ Measurement Range(humidity): 0%~90%RH Selectable temperature format ° C / ° F Display date/for time/temperature/humidity/battery/WIFI Package Includes: 1x Hygrometer note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.