Product Name: Water AlarmModel Number: HS-106Place of Origin: ChinaThis humidity alarm detector is an automatic humidity detector designed for civil application, which has 9V battery as the power supply to increase safetyt. It uses the conductivity of water of the alarm source. It consists ot gold-plated probe, signal process circuit and Motorolla special IC. When the humidity reaches a designated threshold value, the metal probe transfers the detected signal to the internal circuit, which generates the micro-current. The micro current will generate the alarm signal after it has been amplified.