Features: Brand new and high quality. Easy to install and use. Remove the dirty things from the bottom of your aquarium effectively. Supported two suction pipe sizes, suitable for both small and large aquariums. Also be used as a water siphon for water changes, or to empty your aquarium when you connect a hose to outlet. Adjustable height. Hose & Filter bag included. Maximum water depth 52cm. Flow rate 520 l/h. Material: High Quality ABS Plastic and Electronic Components. Power Requirement: 2 x Battery (C/LR14, not included). Package Included: 1 x Battery Fish Tank Gravel Cleaner