WiFi Temperature Sensor Tuya Thermometer Detector Digital Display Home Smart Life App Alert Freezer Water Alarm US Plug1. Built- in Rechargeable battery : can be powered by external DC5V power supply or standby battery ( Please note : if you want to power the detector via backup battery ,Please open the back cover and switch on the detector ) .<br>2. Temperature Unit is optional (Centigrade or Fahrenheit ).<br>3. Check the History Record of temperature anytime.<br>5. Multi -User Supervision Supported : you can click to share the device to other users .<br>6. Buit in Buzzer : the Buzzer will sound when the detector was triggered.<br>7. APP :you can download it by searching for Tuya Smart or Smart Life, support android IOS smartphone.<br>Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on.<br>Voltage: AC100-240V<br>Colour:As Shown<br>Material:plastic<br>Package Contents:<br>1 x Tuya WiFi Temperature Sensor<br>Only the above package content, other products are not included.<br>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.