Easy to operate. No buttons, no programming, just need to put it where you want to check the leaks. Waterproof protection. Widely used in any potential flood spot - next to bathrooms, basements, kitchens, boats, garages or etc. Automatic operation and high sensitivity. Once its three contactor touches the water, it will immediately send out a 85 dB alarm. Low consumption. 9V alkaline battery(not included) normally can last for 1 year. Made of durable ABS Plastics, sturdy and durable, environmental protection. Water damage is one of the most common and expensive problems affecting families. Even a small amount of water can cause serious problem to your family. When detecting even a small leak, the water leakage alarm sounds very loud and lets you know thatyou have a problem that requires immediate attention before it becomes an expensive problem. Feature: Automatic operation and high sensitivity. Once its three contactor touches the water, it will immediately send out a 85 dB alarm. Easy to operate. No buttons, no programming, just need to put it where you want to check the leaks. Made of durable ABS Plastics,sturdy and durable, environmental protection. Low consumption. 9V alkaline battery(not included) normally can last for 1 year. Waterproof protection. Widely used in any potential flood spot - next to bathrooms, basements, kitchens, boats, garagesor etc. Spec: Material: ABS Plastic Color: White Working Voltage: 9V Alarm: 85dB Battery: 9V Alkaline Battery (Not Included) Size: 8.2*3.2cm/3.2*1.3in Package Weight: 81g/2.9oz Package Content: 1 * Water Alarm ( Battery Not Included)