SUNSUN JDP-3500 DC Frequency Variation Pump is a highly efficient and energy-saving pump that operates quietly. It has a large output capacity and high lift, allowing for versatile use. The flow rate can be controlled either by the built-in controller or through a mobile app (available in Chinese language only). It can be used as a submersible pump or an inline pump, and it has a feed mode for added convenience. The pump operates on DC voltage and is compatible with both 110 and 220V countries. Additionally, the flow rate can be adjusted through 5 different gears to meet the specific needs of your application.