C30 is a RTR (Ready to Run) Traxxas Funny Car.  It comes with a Brushless Traxxas ET-3s ESC, Brushless Castle Motor, and a Traxxas 2.4GHZ TQi Radio and Receiver.  It is ready for your Lipo battery up to a 4s.  I ran this car with a 2s and it blasted down the road.  It has I believe a 25t pinion, knock that up into the 30's and this thing would take off.