AUTOMATIC OPERATION AND HIGH SENSITIVITY :: It allows you to detect leaks automatically enough, and once all three contactors hit the 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 sturdy and environmentally friendly. Low consumption. By helping you detect water leaks in your home, it also contributes to energy conservation and environmental protection. You won't regret it when you buy it. A GOOD ASSISTANT IN LIFE:: Water damage is one of the most common and allowed 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 will sound loud and let you know you have a problem that needs immediate attention before it becomes a determined problem. 9V ALKALINE BATTERY :: This product requires a 9V alkaline battery, but we don't have a battery when it is shipped, you need to buy it by a quality foreign friend, this battery usually can battery after 1 year. APPLICABLE AREA:: This product is widely used in all potential flood points - near bathrooms, basements, kitchens, boats, garages, etc. product with confidence, no operation is required, you just need to install the battery, put the product in the test location. White color Packaged quantity : 1 piece