[APP Remote Control] Simple download APP "Smart Life/Tuya" on iOS and Android to add the device to detect the water level overflow, no hub required. Home security in your hand all the time. [Voice Control] Compatible with Alexa & Google Home. Simply use your voice to control the connected devices, free your hands. [Working Principle] When the two feet of the detector was immersed by the water, the alert notifications will be pushed to your phone, be aware of water overflowing in time, reducing flooding risk. [Easy to Install] No complicated installation tools are required. The sensor can be installed with double-sided adhesive tape or screws (included) in just a few steps. [Excellent Design] Low-consumption design, 500mAh rechargeable battery enusres long time using. Ideal water intrusion warning for homes, apartments(kitchen, toilet), warehouses, offices, laboratory, hotel rooms, garages, etc.