Features: 1. Multifunctional: This electric aquarium water changer removes gravel, dirt, and facilitates water changes. 2. Safe: The aquarium vacuum water changer is energy-efficient and operates via an AC adapter or two C batteries (not included). 3. Water Changer: This fish tank vacuum cleaner can be used for water changes and automatically shuts off after siphoning. It efficiently drains dirt from the fish tank. 4. Retractable Design: The aquarium gravel cleaner features an adjustable, retractable design, suitable for various fish tank sizes. It is easy to install and operate. 5. Note: Clean the filter bag promptly after cleaning the gravel. The filter bag is a consumable item and should be replaced if damaged and unable to filter properly. Specification: * Item Type: Aquarium Water Changer * Material: ABS * Plug: EU Plug, Rated Voltage: 100-240V * Battery Type: 2 x Dry Cell C Type Batteries (Not Included) Package List: * 1 x Motor Unit * 3 x Telescopic Conduits * 1 x Mesh Bag Interface * 1 x Filter Bag * 1 x Siphon Tube * 1 x Sand Washing Cup * 1 x Plug * 1 x Instruction Manual * 1 x Moss Removal Brush Notes: 1. Use the provided adapter for the external power supply. 2. Avoid continuous operation for more than 30 minutes to prevent overheating. 3. This product utilizes the siphon principle and cannot pump water from a low water level to a higher one. 4. During draining, ensure the highest point of the drain pipe is not above the initial water level; otherwise, the product may not function correctly. 5. Please allow for minor measurement errors due to manual measurement.