Features: 1. Temperature & Humidity Detection 2 in 1. 2. 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 ). 3. Temperature Unit is optional (Centigrade or Fahrenheit ). 4. Check the History Record of temperature or humidity anytime. 5. Multi - Supported : you can click to share the device to other users . 6. Buit in Buzzer: the Buzzer will sound when the detector triggered. 7. APP:you can download it by searching for Tuya Smart or Smart Life 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, 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 Detecting Humidity: 0% to 100% (no condensation) Temperature humidity accuracy: 0.5 1%RH Measurement error: 1 3%RH WIFI band: 2.4G ( not support 5G) Buzzer alarm time: default 15 seconds uncontrollable Size: 90mm x 63mm x 25mm Voltage:AC100-240V Plug Type:EU Plug,it applies to Indonesia, , , , Italy and so on color:White Material:plastic Package Contents: 1 x Tuya Smart Temperature Detector