1. Built- in Rechargeable battery : can be powered by external DC5V power supply or standby battery ( Please note : if you want to power the detector via backup battery ,Please open the back cover and switch on the detector ). 2. Temperature Unit (Centigrade or Fahrenheit). Check the History Record of temperature anytime. 3. Multi -User Supervision Supported : you can click to share the device to other users . 4. Buit in Buzzer : the Buzzer will sound when the detector was triggered. 5. APP :you can download it by searching for Tuya Smart or Smart Life, support android IOS smartphone. Please note: The KONLEN temperature sensor with 1 meter cable can be used for indoor and outdoor detection, but the digital display main panel is not waterproof, it must be located indoor. Model Number: KL-951T Smart home 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: Exceed 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.