Description: Sensitive water alarm with 50cm water level detector wire, when there is water flow through the floater of wire, the alarm will generate a loud alarm sound (120-130db). 2-in-1 function: Can be used as a water overflow alarm and a water shortage alarm. The defaut is a water overflow alarm, when water emerge the floater, it will alarm. If you want it to be a water shortage alarm, you just need to install the floater down. Battery operated, powered by 9V battery (not included). No need wiring, comes with adhesive tape, easy to install, just place the alarm to where you want. Suit for machine room, swimming pool, water tank, aquarium tank, water purifier, etc. Specification: Material: Plastic Alarm Size: Approx. 9.7x4.5x2.2cm/3.82x1.77x0.87 inches Wire Length: Approx. 50cm/19.69 inch Power: 9V Battery (Not Included) Floater Length: Approx. 5cm/1.97 inches Package Includes: 2 Pieces Water Sensor Alarms Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color of the pictures and the actual item.