Topvico Water Leak Alarm Detector Sensor Flood Alert 120dB Work Alone Home Security Battery Powered

描述

- 120dB loud alarm voice - High sensitive detect board - 3M double side paster for easy install - 37.8 inches cable, easy extend by user - Supply by 9V battery (not include), battery life will be about 12 months for normal use (low quality battery about 6 months, very high frequency alarm or testing, battery life will be shorter)Note: If the detection board is placed directly on metal, please put a piece paper under the board to avoid false alarms.