The hygger Hang-On Aquarium External Filter is a high-quality filtration system designed for fish tanks ranging in size from 27 to 74 litres. With a dual flow design and a power output of 9W, this filter effectively maintains clean and healthy water for your aquatic pets. The compact dimensions of 29 x 17.9 x 12.7 cm make it easy to hang on the side of your aquarium, while the English language instructions ensure easy setup and operation. This product is a must-have accessory for any fish tank enthusiast looking to keep their aquatic environment clean and optimal.