Product Name: OEM ABS Water Leak Alarm Model NO.: ON GUARD Usage: Auto Type: Home Alarm Working Principle: Electromagnetic Working Mode: Passive Signal Transmission: Wireless Alarm Trademark: OEM Transport Package: Carton Specification: carton Origin: China HS Code: 8531100000 Product Description CharacteristicModel: OG-01When water is present a Piezo alarm is activated andpower by a 9-volt battery.The OG-01 is to make alarm when water is present powered by a 9-volt battery. It works for hot water heater pans, behind washing machines, under sinks, in bathrooms, etc