SMART TEMPERATURE HUMIDITY SENSOR --- Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property. REAL-TIME ENVIROMENT MONITORING --- Through the gateway, the temperature and humidity sensor can be linked with other smart devices in the home to improve the indoor heating and cooling, and make your home more comfortable. LARGE LCD MONITOR --- Large LCD display, with clear and large character easy to read even at long distances. Elegant white round edge design, good decor your home. Low advantage design to ensure long-term battery life, support google home and alexa. APP RMOTE CONTROL --- The LCD screen dynamically displays real-time values, conveys the comfortable state of the home environment, is connected with the gateway and cloud platform, and the mobile APP can view current and historical temperature data. HUB FREE --- No hub required, just connect our smart temperature and humidity sensor with our wifi router and then add our devices to smart the app, you can use it freely without time and distance limited. colour:White Material:ABS size:61 x 61 x 27mm Package contents:1 x wifi thermometer(2 AAA batteries not included) Only the above package content, other products are not included. Note:Light shooting 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.