PRODUCT USAGE: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 that you have a problem that requires immediate attention before it becomes an expensive problem. AUTOMATIC OPERATION amp; HIGH SENSITIVITY:You just need to put it where you want to check for leaks, it will automatically help you detect leaks, and once the three contactors touch the water, it will immediately alert you. Easy to operate. No buttons, no programming, you can use it when you buy it home. HIGH QULITY MATERIAL:Made of high quality ABS plastic, this leak alarm is rugged and environmentally friendly. Low consumption. Helping you to detect the water leakage in your home, it also contributes to energy conservation and environmental protection. You will not regret it when you buy it. 9V ALKALINE BATTERY:This product requires a 9V alkaline battery, but we do not have a battery when shipped, need to be purchased by a dear foreign friend, this battery can usually be used for 1 year, you need to change the battery after 1 year. Make sure the product works efficiently! APPLICABLE AREA:This product is widely used in any potential flood point - close to bathrooms, basements, kitchens, boats, garages, etc.Only if there is a leak in the place where you live or work, you can choose our product with confidence, no need for any operation, you only need to install the battery, put the product in the place to be tested.