LOUD 100DB WATER ALARMS FOR HOME- Each water leak detector features ultra-loud 100dB alarm audio which is loud enough to be heard throughout the house even if leak happens in the basement, garages, or wine cellar. The water detector sensor will sound once the water is detected, alerting you of water leakage to avoid flood strikes. PLACE ANYWHERE LEAKS HAPPEN - Geevon water alarm sensor residential with 3.15in diameter and 1.18in height which is easily placed anywhere you want, such as basements, bathrooms, underneath sinks or by water heaters to detect the leaks as they happen. Don???t let the water leakage damage your home property and cost your money! HIGHLY SENSITIVE WATER LEAK ALARM - Basement water sensor alarm with 3 metal prongs embedded on the bottom is made from high quality ABS materials & electronic parts and waterproof design, it's okay to float on water to detect leaks to prevent the water damage. WATER ALARMS BATTERY OPERATED - Water alarms for basements powered by 6F22 9V battery(Shipped with Battery). No wiring or screws required. Unwrap and install the included battery, then place the water detection alarm in areas where leak and flood may occur. 100% MONEY BACK GUARANTEE - Each package comes with 4 x Wireless Water Detector Alarm Sensors and 4 x 9V Batteries. We offer 30 days free money-back, 12 months warranty, and lifetime consulting service. Please feel free to contact us if you have any issue with our leak detector.