This ECU is designed for sequential fuelling on engines up to 8 cylinders (high impedance injectors). It can run distributor or distributorless engines up to 4 cylinders. It is generally designed to allow the user to optimize the fuel & ignition settings to get the best out of an engine. It uses USB communication from your laptop, which is then converted by a small piece of hardware (MBE985) that converts the USB in CAN, which is a more stable system, used by car manufacturers worldwide.