Single Sensor Moisture Alarms and Signals Watercop to Shut Water Valve MADE IN USA water alarm detects moisture with single probe moisture sensor . Water sensor sounds a alarm intensity similar to a watch alarm or a pager beep when probe detects moisture. The WaterCop , if installed, responds by shutting off the main water valve. The Water Cop is an automatic water valve that is a full ball valve and operates from 120VAC. Note: Safe Home does not recommend using this unit as a local stand-alone alarm as it is not loud. It is meant to work with the Water Cop unit. Water Cop Single Probe Moisture Sensor with Alarm: Monitor specific leak prone areas within home or business for unwanted and potentially damaging water leaks or internal flooding. Water alarm features a robust 418MHz radio transmitter chip set with up to a 200 foot operating range. Moisture sensor has user adjustable digital security codes. Operate water sensor on either two (2) AA batteries or an optional AC power adapter.Note: Current configuration of this Water Hound water detector does NOT allow for batteries to back up AC Adapter. Low battery warning chirp. 6 foot water sensor cord. Made in USA by Dynaquip Controls