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.