The CTR-SPD10 control board allows for manual speed adjustment of the Koolance PMP-400 or PMP-450 pumps (and other Laing DDC and D5 pumps like Swiftech MCP-350, MCP-350, MCP-655). It is much more accurate than the previous PCB-PWM10P controller. The CTR-SPD10 can also be used for high load fan control (~4A). A 3 to 4-pin pump adapter, Molex power cable, velcro mounting strip, and mounting screws are included.