Our Fretglow Fiber Optic Lighting system will enhance you Guitar allowing you to see your markers in Dim or Dark settings like, Stage, Bedrooms, Dark Bars and More. Remember that this only the Kit, you still have to assemble the fiber and electronics. Comes with Fiber, Battery holder, Resistors, led and instructions. RGB 4 Leg Included. You can Adjuct Color on this LED.