Gizmode Stand Alone Water Alarm Extreme for Very Loud Audible Property Protection Gizmode Water Alarm WA-01X is 3 1/8 inches in diameter. Extremely loud 115 db alarm sounds for up to 144 hours when two 9V alkaline batteries not included are installed. Option one battery. 4 sensor-pin legs detect moisture. Each water sensor is tested before packaged. Water alarm detector uses no electronic parts. When two feet get wet, the water alarm sounds. WA-01X Water Alarm Features Alarm Extra loud, sounds at 115db up to 144 hrs with two batteries installed Construction High end commercial grade design. Sturdy ABS plastic outer shell w/ 4 stainless steel sensors a water tight design Structure Tip resistant Moisture Sensors Sensitive to very low moisture levels Stainless steel sensors Will not rust or stain. Sensor-Pins/Legs 4 come into direct contact with any surface including carpeting for accurate and immediate moisture detection. Installs anywhere in seconds Optional Sump Pumpor Water Overflow Attachment Warns of sump pump overflow, bath tub overflow, aquarium fill warning, etc. Attaches easily to the Water Alarm by gently sliding the end open of each connector of the bottom of the Water Alarm When installing, test sensor by immersing in 1 or more of water 1-yr. limited manufacturer's warranty Dimensions 3 inches diameter x 3.75 inches height Power source One alkaline 9-volt battery not included. Option of two batteries for 144 hours of continuous alarm. Battery life About one year Low battery warning Chirping noise Shares common accessories Two expansion ports allows for remote placement of additional sensors and enhanced functionality sensors sold separately Approximate dimensions Height/Diameter 3 1/8 x 3 2/3 Manufacturer Gizmode Innovations. Warranty 1-yr. limited manufacturer's warranty Note This product is a water detector only. This water alarm will NOT shut off water flow. Test monthly. Warning You should test