1. Real time temperature supervision. 2. Higher/Lower temperature alarm, push notification and buzzer alert 3. Built- in Rechargeable Battery: Daily working need be powered by DC5V power adapter. The backup battery can continue to work for some hours after external power is outage. 4. Temperature Unit is switchable (Centigrade or Fahrenheit).Users can switch the Celsius degree to Fahrenheit via App Setting Option. 5. Temperature can be calibrated via App setting. 6. Check the History Record of temperature anytime, one record per hour, can save 7 days datas. 7. Multi -User Supervision Supported : you can click to share the device to other users . 8. APP: Tuya Smart or Smart life Plug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Colour:As shown Material:plastic Package Contents: 1 x Wifi Temperature Sensor 1 x 3Meter Wire 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.