Features: The water levels alarm automatically activates and shuts off bilge pumps when water reaches specific levels. The precise operate of the sensors switches ensures proper bilge pumping and provides peace of mind to ensuring the ship safety. Marine water levels induction switches adopts high precisely induction technology, intelligent and automatic, which can accurately detect change of ship water levels and ensuring the accuracy of data. Make of excellent Flame Retardant ABS, which can run stably, having the characteristics of long life. Bilge pumps can be used in aquarium, fishing boats, fountain and other places to easily drain water to ensuring the ship in the proper water levels. Specifications: Component: Flame Retardant ABS Size: about 10x8x8cm/3.94x3.15x3.15inch Package Includes: 1pc Liquid levels sensors switches note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.