FOP's NEW RC LED DIMMABLE LIGHTING SYSTEM is perfect for any RC Hobby. Simpley plug our ESC Dimable system into any open port on your RX and then plug the power lead into any 10-13 volt DC lipo and your ready to GLOW. You pick colors and Length. Fully Dimmable, you set up on your TX for effects. This set if for 2- ALL YELLOW 19 inch for a total 38 inch wingspan.