The system can be set to fire 2 cars independently or simultaneously and each is timed to the 1000th of a second!The electronic raceway includes both start and finish gates, firing handles, Christmas tree starting lights and all the items needed to have a great race. The manual system does not include electronic timing or Christmas tree starting lights. All steel construction, easy set up with complete operating instructions, dual starting handles, adjustable firing arms, and true electronic fire (not a slammer bar system).