Feature: 1. After the pump is powered off, the water in the container will flow back along with the pipe, so that there is water in the container, which will help the pump to refill again. 2. Built‑in water filtration system, integrated mechanical, chemical and biological filtration functions, effectively eliminate toxins in the water and ensure clear water quality. 3. The professional circulatory system design makes the water surface of the ecological tank to be turned, which helps release the carbon dioxide in the water. 4. Comprehensive integration of water pump and water filter system, this filter can dissolve the oxygen in the air into the water to provide enough oxygen in the fish tank. 5. Fast assembly and easy operation; the adjustable flow knob allows for increased or decreased water flow at will, which is extremely helpful during feeding times, or use it as needed. Specification: Item Type: Filter Material: PVCPower: 3.5W Flow Rate: 300L/HPlug Type: EU Plug Voltage: 220V. Package List: 1 x Filter 1 x Upper Cover1 x Filter Sponge1 x Position Adjustment Button1 x Flow Switch1 x Degreasing Film1 x Degreasing Film Connector1 x Elbow1 x Flower Basket1 x Tee3 x Connecting Pipe1 x Accessories Note: 1. Before use, you must check the voltage marked on the pump, and whether the frequency is consistent with the actual voltage used.2. The installation place must be higher than the aquarium.3. When installing or removing the filter, you must first unplug the plug and cut off the power supply.4. The plug should not be wet, and wet hands should not touch the plug. 5. For the first use, the filter container needs to be filled with water before the water pump can enter normal operation.