Note:This pump does not contain filter material. Filter materials need to be purchased separately,You can choose a package that includes filter materials. Product parameter: Voltage:220-240V Power:3W/5W/7W Features: -With oil film regulating valve, the water inlet size of the oil film can be adjusted at will.Restore clear water quality -Biochemical filtration culture of niitrified bacteria.Standard biochemical filter cotton is simple and effective,and filter materials can be freely placed according to requirements.Filter materials need to be purchased separately. -Anti-dry design, built-in thermal protector, will automatically cut off the power if the temperature is too high, safe -Quiet design, the sound is less than 35 decibels, and it comes with a shock-absorbing support block to reduce the vibration generated by the water pump. -Universal duckbill water outlet, multi-angle oxygenation to create waves. It can also connect the water pipe to increase the dissolved oxygen in the water Notice for use Before using for the first time, fill the water first and pay attention to ensure that the water level is not lower than 10mm on the upper edge of the barrel wall.