Features:  - The temperature humidity exceeds the maximum setting, the sensor will automatically alarm.  - Using tuya app to create scene,enjoy comfort living environment,such as when temperature are higher 28°℃,turn on air conditioner.  - Hands-free Voice Control, konw temperature humidity via simple voice control commands.  - Remotely Monitor Temp and Humidity, view temperature humidity history via app.    Specification:  Working voltage: 4.5V;  Alarm current: 60mA;  Quiescent current: 25uA;  Transmitting frequency: 2.4GHZ WiFi;  Launch distance: 50m;  Communication method: wireless;  Battery Type: 1.5V AAA battery x3（Battery not included）;  Warranty: 2 years;  Working Temperature: -10~+55℃;  Working Humidity: 0 ~100%RH;  Voice control: Compatible with Alexa/Google Assistant;  APP control: Remotely Monitor Temperature and Humidity;  Scope of application: homes, shops, office buildings, warehouses, schools;  Weight: 0.2kg/pcs;  Color: Black;    Package included:   1/3 x Digital Temperature and Humidity Sensor Detector