Fangrui Product Details Smart Wifi Temperature Sensor: You Can Easily Monitor Temperature And Humidity Data In Real Time From Anywhere With The Tuya App. Extend Your Monitoring Range To Any Location Indoors And Outdoors.(not Support 5g Wifi) Ersatile And Accurate: Sensors Provide A Wide Range For Detecting Humidity And Temperature. The Range For Temperature Is Between 0.54/0.3 While The Humidity Measurement Range Is Between -rh For More Accurate Measurements. Alert Function: Set Preset Temperature And Humidity Ranges, And Thetuya App Will Alert You Via Cell Phone When The Smart Hygrometer Thermometer Detects Readings Outside Of The Range. Respond Faster To Sudden Changes In The Greenhouses, Bedrooms Temperature, And More. Please Note:the Physical Slightly Color Difference Or Difference, Does Not Affect The Use, Please Do Not Mind, Thank You! Power Supply:2 X Aaa Battery(not Included Batteries) Colour:as Shown Material:plastic Package Contents: 1 * Wifi Hygrometer Thermometer 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.