1.To avoid expansion of damage caused by water leakage.
2.Detect water leakage inside of various wall of house construction and produce beep tone.
3.Very small power consumption during detection, it will work for approximately one year.
4.Currently used by many of Japanese construction companies.
5.Once water detected, it will sound continuously even after the water disappear.
6.Provided reset switch to stop beep tone.
7.Power source: 3V coin battery*2PCS