Silverlit - 3DX-Trek - Ultimate Loop Set Description All New High-Speed I/R Micro Racers and Stunt Track Set E-Power Boost can be triggered from the remote to take on the Mega Loops Controller LED signals when E-Power Boost charge is ready. Charge the car from the controller Controller LED signals when E-Power Boost charge is ready. Charge the car from the controller E-Power Boost can be triggered from the remote to take on the Mega Loops Track formation has more than 12 feet of the track with a loop 90 cm long