Communication Method:ZigbeeOrigin:Mainland Certification:CeType:Sonoff Lcd Temperature And Humidity SensorPower Supply:3v Button Cell X 1 Model:Cr2450Temperature Tolerance:±0.2℃/±0.4℉Humidity Tolerance:±2%rhMcu:Efr32mg22Color:WhiteLcd Dimension:2.8 (tn Reflective Segment Code Screen)Product Dimension:59.5x62.5x18.5mmWireless Connection:Zigbee 3.0(ieee802.15.4)Applicable Place:IndoorWorking Temperature:-5℃~40℃/14℉~140℉Working Humidity:5%-95% Rh, Non-condensingWorking Height:Less Than 2000mApp Control:Compatible With Ewelink AppVoice Control 1:For Alexa Echo Smart Speaker AccessoriesVoice Control 2:For Google Home Assistant Smart Speaker AccessoriesService: , , Dropshipping, Fast Shipping, :SufficientType 1:Smart Home Automation Diy ModuleType 2:Smart Home GadgetsType 3:Smart House KitType 4:Automation ResidentialType 5:Smart Home Security Protection Alarm System