Notes 1. When installing the fish tank water changer, please be sure to submerge the water changer in the water and exceed its starting water level lineMIN, and then turn on the starting switch.Otherwise, the product will not start properly. When the water exchanger outlet starts to flow, you can raise the water exchanger to work. You can watch a video on this page. 2. When using it, please pay attention to the water level of the fish tank must not exceed the highest water level of the water changerMAX, otherwise, the electric machine will burn out. Description: Material: ABS Plastic Input voltage: AC110- 220V Length:560-820mmadjustable Weight:390G Package Included: 1 x Aquarium Fish Tank Cleaner Pump Set 1x Power plug battery not included Description: -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. Note: If you need hoses, please click on this link and recommend purchasing 12mm*16mm hoses.