AUTOMATIC OPERATION AND HIGH SENSITIVITY : You just need to place it where you want to check for leaks, it will automatically help you detect leaks, and once all three contactors touch water, it will alert you immediately. Easy to use. No buttons, no programming, you can use it when you buy it at home. HIGH QUALITY MATERIAL : Made of high quality ABS plastic, this leak detector is robust and environmentally friendly. Low consumption. By helping you detect water leaks in your home, it also helps conserve energy and protect the environment. You will not regret it when you buy it. A GOOD ASSISTANT IN LIFE : Water damage is one of the most common and costly problems for families. Even a small amount of water can cause serious problems for your family. When you detect even a small leak, the water leak alarm sounds very loud and lets you know you have a problem that needs immediate attention before it becomes a costly problem. 9V ALKALINE BATTERY : This product requires 9V alkaline battery, but we don't have battery when shipping it, you need to buy it by quality foreign friend, this battery usually can battery after 1 year. APPLICABLE AREA : This product is widely used in all potential flooding points - near bathrooms, basements, kitchens, boats, garages, etc. product with confidence, no operation is required, you just need to install the battery, place the product in the test location. White color Delivered quantity : 1 piece