The smart sensor can update temperature and humidity every one minute. And it can be placed directly on the table or mounted to the wall. This smart sensor can record the temperature and humidity changes on the APP and present them with graphics, which can let you know the latest data changes clearly. It is constructed of PC flame retardant material. The length of this product is 7cm, the width is 2cm and the height is 2.5cm. It is suitable for bedroom, living room, office and so on. Item Name: Temperature Sensor Material: PC Flame Retardant Power Supply: 2 x 1.5V AAA Batteries(Not Included) Temperature Measurement Range: -10 Degree Celsius to 55 Degree Celsius Temperature Accuracy: -0.3 to 0.3 Humidity Measurement Range: 10 Percent to 99 Percent RH Humidity Accuracy: - 6 Percent RH to 6 Percent RH Color: White Features: Scene Linkage, Real-time Monitoring, Curve Graph Size Details: LxWxH: 7cm x 2cm x 2.5cm/2.76" x 0.79" x 0.98"(Approx.) Notes: 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. If you need to realize the linkage function, such as using with the air conditioner, you can use the universal infrared remote control to realize the linkage. If it is matched with a humidifier, it can be linked with a switch, or you can contact customer service to purchase. Note that this product only supports degrees Celsius, not Fahrenheit. First, you need to connect to the gateway before you can remotely control it through your mobile phone 3G/4G/WiFi. This product has no low battery reminder function, no high temperature or low temperature alarm function. Only the WIFI version has these functions. For details, please consult customer service. Package Includes: 1 x Temperature Sensor 1 x User Manual