1. Real-time temperature. 2. High/Low temperature alarm, notification and buzzer sound. 3. Built-in Rechargeable Battery: Daily operation requires power from a DC5V power adapter. The backup battery can continue to work for a few hours after a power outage. 4. The temperature unit is switchable (Celsius or Fahrenheit). Users can switch from Celsius to Fahrenheit via the App settings option. 5. The temperature can be calibrated via the App settings. 6. Check temperature history at any time, one record per hour, can save 7 days of data. 7. Multi-language: You can click to share the device with other users. 8. APP: Tuya Smart or Smart Life. Plug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on. Color: As shown Material: Plastic Package Contents: 1 x Wifi Temperature Sensor 1 x 3 meter 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 +/- 1-3 cm.