Dimensions: 8 x 3 cm All-in-one water detector and alarm Easy to use near water heaters, sump pumps, under sinks and toilets. Power supply: 9V DC battery (not included) Alarm sound level: 90 dB Features: Spot detector for unlimited use; easy to reuse Easy to use near water heaters, sump pumps, under sinks and toilets. Water Detector and Alarm: The most economical solution to protect yourself from water leaks in different rooms of the house Loud sound alarm An economical solution to prevent water leaks Specifications: Alarm sound level: 90 dB Power supply: 9V DC battery (not included) Dimensions: 8 x 3 cm Method of Test: Place the water leak alarm on a damp towel; the device will beep. Remove the device from the damp towel; the alarm will stop.