Description: - Brand New & High Quality - Deep Filtration: Built-in high-quality filter cotton ensures deep mechanical and chemical filtration, providing healthy and clean water environment. - Adjustable Water Volume: Water volume can be manually adjusted according to the size of your fish tank. - Quiet Operation: Filtration, water and oxygen addition are all Silent Operation, not bothering your sleep and work. - Compact and Lightweight, also suitable for small fish tanks. - With only 2.5w power, very energy saving. - Equipped with a USB interface, can be connected to various electronic devices such as a power bank. - Easy to Install and Use. Simply hang it on a 3 or 5 mm thick fish tank, plug and play. - Length of USB Cable: 1 meter approx. Package including: 1x USB Waterfall Filter