Description: If the temperature is higher or lower than the range of temperature we preset . The detector will push the alarm alerts to app and at the same time the detector will sound to remind to control the temperature. And you can do the real-time supervision via app.     Features: 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 is optional （Centigrade or Fahrenheit ).  3. Check the History Record of temperature anytime.  5. Multi -User Supervision Supported : you can click to share the device to other users.  6. Buit in Buzzer : the Buzzer will sound when the detector was triggered.  7. APP: you can download it by searching for Tuya Smart or Smart Life, support android IOS smartphone.     Note: The 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.     Product Parameters: Powered by: DC5V 1A power adapter (included).  Built-in rechargeable battery: 3.7V 1100MA.  Note:the backup battery switch located at circuit board. For the first time use, please remember to open the back cover, then switch on backup battery switch.  Battery standby time: about 6 hours.  Alarm Indication: The digital tube number flashes.  Pairing indication: Green indicator flashes.  Detecting temperature: -40℃ to +120℃.  Temperature accuracy: 0.5℃.  Measurement error: ±1℃.  WIFI band: 2.4G ( not support 5G).  Buzzer alarm time: default 15 seconds uncontrollable.  Size: 90mm x 63mm x 25mm.     Package included: 1 x Tuya WiFi Temperature Sensor Thermometer