Product information: Material: ABS Applicable water level: 11-62cm Battery: Two AA batteries Water change hose size: 75cm Weight: approx. 0.281kg Packing list: 1 * corrugated pipe, 1 * sand filter net bag, 1 * host Three modes: 3-in-1 aquarium cleaning tool sucks water, removes algae and cleans gravel. Multifunctional design: The gravel cleaner can install battery and be used directly with adapter. Adjust the different lengths freely: 62/73cm, suitable for medium and large aquariums. Easy installation and use: Installed gravel cleaner, keep the water level between MAX(60cm) and MIN(20cm), then turn on the switch. The water in the aquarium is automatically pumped out through a hose to change the water. Cleaning function: Can also clean gravel effectively by sucking out fish waste and other debris without requiring water changes. Function and accessories: High safety performance, only needs 2 C-size alkaline batteries (package not included). The length of the blue hose: 75cm