Topvico Flood Alarm Water Leak Sensor Detector 130dB Work Alone Home Security 3 Pack

130dB loud alarm voice, keep alarm to notice you or neighbors until the water dry or sensor turn off
High sensitive 24k plating detect board
3M double side paster for easy install anywhere
37.8 inches cable, easy extend by user, detect water anywhere corner
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)