Features: Simple download APP "Smart Life/Tuya Smart" on the smartphone to add the device to detect the water level overflow, no hub required. When the detector was immersed by the water, the sensor will beep, and the alert notifications will be pushed to your phone, be aware of water overflowing in time, reducing flooding risk. Ideal water intrusion warning for homes, apartments (kitchen, toilet), warehouses, offices, laboratory, hotel rooms, garages, etc. Excellent design, tiny and fashion. Low-consumption design, which can make it work long time. Installed by double-side adhesive sticker, easier and convenient to use. Note: Only supports 2.4G WiFi. Specifications: Type: Water Level Alarm Protocol: IEEE 802.11b/g/n, 2.4G APP: SmartLife/Tuya Smart Working Voltage: DC 3V Battery Type: 2*AAA 1.5V (NOT included) Static Current: 20uA Alarm Current: 40mA Alarm Sound: 85dB Working Environment Temperature: -10~60 Operation Humidity: