This is a DIY (do it yourself) the robot controller is actually a 2.4ghz wireless play station 2 game controller. It includes a small receiver module with ps2 connector and two cables. No level shifter is required for this version of the remote control, though one can be used without issue. The robot controller requires two “aaa” batteries (not included) for use. The green led on the receiver will blink when powered, and become solid when connection is established with the transmitter.