Shop name: Chong Qing Shuo Yue Ke Ji You Xian Gong Si Features: 1. If the temperature and humidity are too high or too low (can be set by yourself), the app will receive an alarm push and will remind you that the temperature is too high. 2. Radio transmission circuit and coding technology solve the problem of signal interference and blocking; split design, high reliability. 3. Multiple temperature modes are adjustable and suitable for different scenarios; online reports are sent to the host regularly. 4. Wireless transmission of data signals, remote monitoring by mobile phone; has low voltage monitoring prompt function. 5. Ultra-low power consumption and long battery life. Tuya Smart Home WiFi Temperature and Humidity Detector, Wireless Temperature and Humidity Sensor, Intelligent Linkage with Alexa and Google Smart Speakers. Communication: WiFi 2.4G Working Temperature: -10~+55C, 0~100%RH Power Supply: DC 4.5V (3 x AAA batteries, not included) Note: The data reporting of temperature and humidity is conditional. Data reporting rules can be set by setting the time and temperature and humidity changes in the set value (settings); when changes occur, data synchronizes to the app platform. Size: 65 x 60 x 26mm Material: ABS Color: Black Package Contents: 1 x Temperature and Humidity Sensor 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.