The Noah's Flood Alarm is simple device to install and could save you thousands in home repairs caused by water damage. You can now eliminate flooded basements, garages, laundry rooms, bathrooms, pools, sinks, toilets, and hot-water heaters. Simply mount the alarm on a clean, flat, dry surface with the included adhesive pad. Mount the water sensor with the included suction cup in a location that will alert you to an overflow. When water covers the sensor the flood alarm will flash and an alarm will sound. The unit requires 2 AA batteries that are not included. The alarm measures in at 3 inches x 1 3/4 inches x 1/2 inches. The sensor is mounted at the end on approximately 10 feet of wire