1. Built-in rechargeable battery: It can be powered by an external DC5V power supply or a backup battery (Note: If you use a battery to power the detector, please open the back cover and open the detector). 2. Temperature unit (Celsius or Fahrenheit). View temperature history at any time. 3. Multi-person support: You can click to share the device with other users. 4. Built-in buzzer: When the detector is triggered, the buzzer will sound. 5. APP: Search Tuya Smart or Smart Life to download. It supports Android and IOS smartphones. Note: The KONLEN temperature sensor with a 1-meter cable can be used for indoor and outdoor detection. The digital display motherboard is not waterproof and must be located indoors. Model: -951T Platform: Tuya Display: LED digital display Detection: Temperature Power supply method: External DC5V 1A power adapter Rechargeable battery: 3.7V 600MA Battery standby time: About 6 hours Temperature detection range: -40 to +120 degrees Celsius WIFI frequency band: 2.4G, does not support 5G Temperature alarm: upper and lower limits Color: as shown in the picture Material: plastic Packaging content: 1 x Tuya Smart Temperature Detector Only the above packaging content does not include other products. NOTE: Light reflections and different monitors may cause the color of the item in the picture to differ slightly from the actual item. The measurement allowance is +/-1-3cm.