Name: Wireless Water Leakage Detector Model: WL-100 Wireless Water Leakage Detector is a very useful unit, it can work standalone as well as work with the alarm panel. Low power consumption and high sensitive, easy to install, usually it will be installed under the water valve or water pipe to monitor the water leakage. It can use independently or as a front-end detector of an alarm system. ★ Specifications: Working Voltage: 9-12VDC ; Battery Life: About 2 years (counted at 3 times each day); Wireless Frequency : 433 MHZ Transmission Range : 100m Working Current (mA): 10-20mA Static Current(uA): 4-6uA Operating temperature: -10degree - +50degree; Relative humidity: ＜ 95% ; Applications : For indoor use. Kitchen, Coal mine, Corridor, Office, Room, Museum, Library, Finance Room, Warehouse, etc.