When a water leak is detected by the sensor it will sound an alarm and send a signal to automatically shut off the incoming water supply. Typically installed on a water heater or washing machine outlet box and sensor placed in pan or floor under water heater or washing machine outlet box. It also includes manual open/close buttons and a button to reset after the leak is repaired. They can also be used in so many other locations in residential and commercial environments. Our kit comes with everything you need: Motorized Stainless Steel Shutoff Valve NTP Pipe Threaded, Valve Controller with power adaptor (support backup battery) , and Water Detector Bell Probe. Specification Alarm startup time:1s; Valve close time:1s; Alarm time:pause 10s and then alarm again Output electric potential:80dBu; Battery type:AA(not included); Power adaptor:DC12 0.5A It can connect with home security alarm and control it by 3P terminal cable. Package 1,Automatic shutoff valve x 2 2,Control Unit x 1 3,Water leak sensor x 2 4,valve extension cable 5,Power adaptor 6,User manual Brass NPT threaded 3/4 ball valves: National Pipe Thread standards make you install it easily and allow you to control a flood from two points When the sensor detectes a water leak, the control unit will sound an alarm and send a signal to valves. It also can connect with home security alarm and control it by 3P terminal cable. It needs 4 pieces AA Battery to work. After receive the signal from cotrol unit, the valves will automatically shut off the water to your appliances to keep your house from flooding. Comes with 2 sensors that you could take it more places. Cable length of Water leak sensor: 19.68ft/6m. Automatic Water Leak Shut Off Valve System 2 Sensors Automatic Water Leak Shut Off Valve Water Leak Detector with 2 Valves Buying Options Add to Cart Add to Cart Customer Reviews 4.1 out of 5 stars 147 4.1 out of 5 stars 147 4.1 out of 5 stars 147 Price — no data $119.99$119.99 $169.99$169.99 Automatic Shut Off ✓ ✓ ✓ Sensor 1 sensor 2 sensors 2 sensors Valve 1 valve 1 valve 2 valves