SCYTHE KM06-BK Kaze Master Flat Fan Control Unit Overall Dimensions: 148.5 x 42 x 83 mm / 5.8 x 1.6 x 3.26 in Display Dimensions: 119.3 x 16 mm / 4.7 x 0.62 in DC Input: 5 V or 12 V (From PC Power Supply) DC Output: 3.7 V (+/-10%) - 12 V (+/-10%) Fan Control Channels: 4 Fan Speed Range: 0 - 9990 rpm