FOP's RGB LED Controller will light up to 12 3" Bars, or 30 Feet of any of our Flex LED strips. It has Full rainbow mode, Single Color Mode, Strobe, and Fade mode. Adjustable Speed for effects. 12 VDC Input.. Size: 1 1/2" x 1"W. Controller Only !! This unit comes with a 12v 600mA transformer that will run up to 10 flex strips. If you wish more please order our Amplifier unit.