Features: Easy to install and operate. 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. Just press the power button to start, place the cleans as the position you desire to clean fish excrete and other dirt in the aquarium. Specification:Power Requirement: 2 x Battery (2 x C/ LR14 Batteries not included). Material: ABS Plastic and Electronic Components Length: 58-94cm(adjustable) / 22.83"-37" (adjustable)Maximum flow: 520L/h Maximum length: approx. 94 cm/ 37.01 in Maximum water level: approx. 75 cm/ 29.53 in Color: Beige & gray Package List: 1 x Integrated Motor 1 x Water Inlet Pipe 2 x Extension Pipe 1 x Siphon Pipe 1 x Mesh Bag 1 x Sand Washing Head 1 x Cleaning Brush 1 x Mesh Bag Fixing Cover Tips: 1. Before use, the starting water level line should be immersed in water and then started. After normal operation, it can be pumped out; 2. The fish tank is under one meter, the applicable water level is 20 x 75cm / 7.9 x 29.5in 3. Considering the convenience of disassembly and washing, there is no sealing design for the position of the impeller cover, so there may be slight water leakage during use, which will not affect the use. Installation Notes: 1. Take out product accessories 2. The integrated motor is connected to the water inlet pipe 3. Connect the filter bag 4. The water change mode can be connected to the extension tube 5. According to the length of use, the extension pipe is connected with the water inlet pipe 6. According to the usage, install sand washing head / cleaning head 7. Install the battery 8. Turn on the switch and use it at the starting water level