Ultra Quiet: great filter solid and well built and quiet low operation sound Will not affect your quality of life, will not scare small pets. 4 in 1 multifunction: Multi-function free switching:This filter come with 3 kinds of water outlet,you can switch increase oxygen and filtration, wave maker pump, water change and pump water function easily.and fish tank filter fits for both Freshwater and saltwater. Great flow rate: 6W 134GPH (500L/H):Compared with the old version of the filter, this new version is a huge improvement. It is much easier to open and close the top.Great flow rate, keeps the water crystal clear. Effecticent filteration:The filter is equipped with a biochemical sponge,which can effectively filter waste and improve the circulation system to maintain a clean water environment. easy to seperate and clean.Filtration can be disassembled without tools, it is convenient to replace the filter cotton and biological filter medium, and it is easy to operate and carry