Function: 1. Automatic operation and high sensitivity. When its three contactors touch the water, it will immediately send an 85dB alarm. 2. Easy to use. No buttons, no programming, just place it where you want to check for leaks. 3. Made of high-strength ABS plastics, solid and durable, environmental protection. 4 . Low consumption. 5 . Waterproof protection. Widely used in any potential flood site - next to bathrooms, basements, kitchens, boats, garages etc. Specification : Water damage is one of the most common and costly problems affecting families. Even a small amount of water can cause a serious problem for your family. When even a small leak is detected, the Water Leak Alarm sounds very loud to let you know you have a problem that needs immediate attention before it becomes a costly problem. Characteristics: Automatic operation and high sensitivity. When its three contactors touch the water, it will immediately send an 85dB alarm. Easy to use. No buttons, no programming, just place it where you want to check for leaks. Made of high-strength ABS plastics, solid and durable, environmental protection. Low consumption. Waterproof protection. Widely used in any potential flood site - next to bathrooms, basements, kitchens, boats, garages etc. technical data : Material : ABS plastic White color Working voltage: 9V Alarm: ≥85dB Size: 8.2*3.2cm/3.2*1.3in Package Weight: 81g/2.9oz Package Contents : 1 * water leakage alarm ( battery not included)