1. Real time temperature . 2. Higher/Lower temperature alarm, 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 datas. 7. Multi - 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, , , , 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 are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.