Fan Controller Lamptron FC5 V2 Silver, 7 Changeable Display Colors, Up to 30W per Channel, 4 Channels Dimension: 148.5mm*77mm (5.25" Bay), Power Output: Up to 30W x 4 channel DC input: +12V (Standard 4-Pin Connector), DC Output: 0V- 12V DC, Control Channels: 4 pcs Changeable Display Color: Red, Yellow, Green, Cyan, Blue, Purple, White CNC Milled from blocks of 3/4" thick solid aluminum Four knobs to contorl 4 x 3 pin Channels