Features Place the Leak Alarm in any potential flood spot - next to bathrooms, basements, kitchens, boats, garages or etc. When the Leak Alarm detects even a small water leak, it sounds a very loud alarm and lets you know that you have a problem that needs your immediate attention. Automatic operation. Once its three contactors touch water, it will sound immediately with 85dB loud alarm; No buttons, no programming, just place it where you want to check water leakage; Requires a 9-volt alkaline battery(not included)，and normally a new battery can last for 1 year; Use by water heater, sink cabinet, sump pump, washing machine, radiators and more; Made of durable ABS Plastics. It is specially designed to float in flood circumstances. Specifications Material: ABS Plastic Color: White Size(Diameter x Height): about 8.2 x 3.2cm (3.23 x 1.26” ) working voltage: 9v Battery: 9V Alkaline Battery (not included) Alarm: 90dB Package include 1 x Water Leak Alarm(Not included Battery)