Shop name: Chong Qing Shuo Yue Ke Ji You Xian Gong Si Features: 1. When the temperature and humidity are too high or too low (customizable settings), the app will receive an alarm notification to alert you. 2. Radio transmission circuit and coding technology help prevent signal interference and blocking; split design ensures high reliability. 3. Multiple temperature modes are adjustable for different scenarios; regular online reports are sent to the host device. 4. Wireless data transmission enables remote monitoring via smartphone; includes low voltage warning function. 5. Ultra-low power consumption with extended battery life. Tuya Smart Home WiFi Temperature and Humidity Detector, wireless sensor with smart linkage compatibility for Alexa and Google Assistant. Communication: WiFi 2.4G Working Temperature: -10C to +55C, 0-100% RH Power Supply: DC 4.5V (3 x AAA batteries, not included) Note: Temperature and humidity data reporting is conditional. Reporting rules can be customized by setting time intervals and threshold changes in the app; data syncs to the app platform when changes occur. Size: 65 x 60 x 26mm Material: ABS Color: Black Package Contents: 1 x Temperature and Humidity Sensor 1 x English Manual Only the items listed above are included; other accessories are not included. Note: Lighting reflections and screen differences may cause slight variations between the product color in images and the actual item. Measurement error allowance is +/- 1-3cm.