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Features: * Water Detection: When detected water level reaches 0.5mm, the linked gateway alarms through APP. * IP67 Waterproof: The water leak sensor meets IP67 water proof and dust proof rating. * The shell is made of UV resistant material and the appearance is fadeless for long term using. * Low power consumption. With a button battery, it can last for 2 years under normal circumstance. * No need complex installation, place on Washroom, Bedroom, Warehouse, Machine Room.