4 Wide Application: Suitable for aquarium fish for tank water, home for tank water, sump water, and other applications 3 Simple Maintain: The water leak sensor is powered by replacable button battery not working well, disassemble the back for shell, check the battery, whether the motherboard plug is loose Fasten the plug or replace the battery will solve problems 5: engineering plastics and electronic components, it is resistant to aging and has a long service life 1 Water Detector: The water sensor has two parts, alarm body and probe adhered to a sucket cup Once the probe is soaked by water, alarm sounds 6 Note: Please dry the probe with tissue after using Except for the probe, other parts cannot for touch water, Manufacturer: LiRRvb