Koolance CTR-SPD24X2 Dual 24V Water Pump Controller
CTR-SPD24X2 steps-up 12V computer voltage to 24V DC for 1-2 pumps. This allows Koolance PMP-450 and PMP-450S pumps to operate closer to maximum specification, but the unit supports virtually any water pump (be sure your pump can handle the extra power!) The controller provides independent manual speed adjustment from 10-24V DC up to 55W per pump. Housed in an anodized aluminum 5.25" bay enclosure. Dimensions are approximately 5.7" x 3.9" x 1.6" (14.5cm x 9.9cm x 4.1cm).
Two 3 to 4-pin pump adapters and mounting screws are included.