1. It Can Support Mobile APP To Control The Intelligent Linkage Device Of Temperature And Humidity Sensor Through Zigbee Technology. The Temperature And Humidity Sensor Is Small In Size, Light In Weight, Easy To Use And Easy To Carry, Allowing Your Parents To Enjoy The Infinite Fun Brought By Smart Home! 2. Intelligent Linkage Equipment, Real-Time Temperature And Humidity Change Perception 3. Emergency Alarm Push For Abnormal Temperature And Humidity 4. History Tracking 5. Long Standby Time Product Name: Tuya Zigbee Temperature And Humidity Sensor Communication Method: Zigbee Battery Power Supply: CR2450 Button Battery Working Temperature And Accuracy: -20℃-50℃.0.3℃ Working Humidity And Accuracy: 0%-100%RH (Non-Condensing) 3% Different batches may have differences in product appearance, color, and printed characters, which not affect the use Colour:White Material:ABS Size:40 x 13mm Package Contents: 1 x ZigBee Temperature And Humidity Sensor 1 x Card Removal Pin 1 x Adhesive Backing 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.