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water sensorFeatures:?Unique,Website:http://www.home-security-life.com, controlled by micro-computer to avoid false alarm, steady function;?Wireless connection,Detect water Specifications:?Operating power: 23A 12V alkaline battery        ?Emitting distance: =100m (in open area)?Service life: =2year UsageWidely used in all relatived area which with water , such as swimming room, high building and so on,. It is used to detect water or other liquid, when water goes up to its detect limit, it will get triggered, and send signal to alarm panel. And just consume 1 ua in standby status.