WIFI THERMOMETER HYGROMETER: No hub required, Connecting with 2.4 GHz WiFi, you can remotely monitor the smart humidity sensor. Smart temperature sensor supports Remote Monitoring, Free App Alerts, F/C Reading, View History Records and Temp HumidityGraphs functions SMART SCENE TO TRIGGER ALERTS OR DEVICES: Wall temperature gauge indoor can be used as the temperature and humidity data source of Tuya Smart, Smart Life App. Create scene via app, Alert will be sent to your phone when beyond preset value. You can alsoset a scene to automatically turn your AC on when the temperature reaches the limit value, or the dehumidifier in your room starts working once the humidity is over higher COMPACT DESIGN & VARIOUS INSTALLATION METHODS: wifi thermometer hygrometer indoor is small enough to fit in potted plants, reptile vivariums, cigar humidors, and other small spaces. You can lay this wireless remote thermometer on any spot of yourhouse or mount it on the wall or other places with the sticker or screws LOW POWER & HIGH-QUALITY AFTER-SALES: Wifi temperature sensor with low power consumption microprocessor for long standby. Comes with 2*AAA Batteries, you can receive alert messages via app when the battery is low for your sensor.