Aquarium Fish Tank Sand Washer Vacuum Cleaner Syphon Electric Water Changer Feature: Battery powered(NOT INCLUDE), safe for you and your fish. Easy installation aquarium vacuum cleaner + water siphon. With this tool, you can remove the dirt from the bottom of your aquarium It can clean gravel,siphon the fish excreta and other dirt out effectively without changing the water. Press the on/off button on the top, the water in aquarium will be pumped out automatically through a hose for changing water. Remove the dirt from the bottom of your aquarium,be used as a water siphon for water changing,empty your aquarium when you connect a hose to outlet. Specifications: Adjustable height:41.5-100cm/16.33"-33.37" Scope of water level:19-77cm/7.48"-33.31 Flow rate 520 l/h. Material: High Quality ABS Plastic and Electronic Components. Power Requirement: 2 x Battery (R20, not included). Package Content: 1 x Electric Aquarium Cleaner