Description/Features: 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. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage: AC100-240V Temperature can be calibrated via App setting. Check the History Record of temperature anytime, one record per hour, can save datas. Multi -User Supervision Supported: you can click to share the device to other users . APP: Tuya Smart or Smart life Specifications: Material: PC+metal Color: As shown Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. 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 +/- 1-3cm.