Nicrew Automatic Gravel Electric Aquarium Gravel Cleaner Water Filter Washer Siphon Vacuum Water Changer Pump for Fish Tank Features: 1.Rechargeable Battery-Powered This is a type of electric aquarium vacuum, and there is built-in rechargeable 4400mAh lithium-ion allows you to recharge the cleaner from power. 2.Quick and Easy Cleanup Process Just put it under the water and it will gently suck the water along with the debris. It then passes through a fine mesh that traps the debris, while the water is returned to the tank. 3.Removeable and Cleaneable Mesh Cartriage Just snap out the mesh cartridge and clean off the mess, and then put the mesh back in for use next time. 4.available in Low water level ,Strong power,Adjustable length Specifications: Input:220V Output:DC 12V Power:6W Max Flow:350L/h Max Height:0.7m Power cable:1.1M Notes: For use in aquariums of all shapes and sizes with a minimum depth of 8?. Not recommended for fine sand or fine gravel. Please keep this package insert for future use. FREE SHIPPING IS INCLUDED!