1. Built- in Rechargeable battery : can be powered by external DC5V power supply or standby battery ( note : if you to power the detector via backup 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: TuyaShow: LED Digital displayDetection: TemperaturePowered by: External DC5V 1A power adapterRechargeable battery: 3.7V 600MABattery Standby time: about 6 hoursTemperature Detection Range: -40 to +120 CentigradeWIFI band: 2.4G, not support 5GTemperature alarm: or lower limit valuecolor:As shownMaterial:plasticPackage Contents:1 x Tuya Smart Temperature DetectorOnly 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.