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 * Aquarium Gravel Filter Cleaner (as picture shown) 

Notes:
1. Installed water siphon, the nose and the outlet must submerge in water, and start the switch! When the water outlet draw the water, raise the gravel cleaner, let the head and outlet above the water.
2. Due to shippment, 2 batteries are not included.

Question: This product may stop work intermittently.
Solution: 1. The interior is dirty and needs cleaning.
                2. You need to replace the battery.