1. Built- in Rechargeable battery : can be powered by external DC5V power supply or standby battery ( note : if you to power the detector via battery , open the back cover and switch on the detector ). 2. Temperature Unit (Centigrade or Fahrenheit). Check the History Record of temperature anytime. 3. Multi - Supported : you can click to share the device to other users . 4. Buit in Buzzer : the Buzzer will sound when the detector triggered. 5. APP :you can download it by searching for Tuya Smart or Smart Life, support android IOS smartphone. note: The KONLEN temperature sensor with 1 meter cable can be used for indoor and outdoor detection, the digital display main panel is not waterproof, it must be located indoor. Model Number: -951T platform: Tuya Show: LED Digital display Detection: Temperature Powered by: External DC5V 1A power adapter Rechargeable battery: 3.7V 600MA Battery Standby time: about 6 hours Temperature Detection Range: -40 to +120 Centigrade WIFI band: 2.4G, not support 5G Temperature alarm: upper or lower limit value color:As shown Material:plastic Package Contents: 1 x Tuya Smart Temperature Detector 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.