The Digital Multi-Retard provides four different stages of retard along with an adjustable start retard feature - all of this with no modules!The MSD Multi-Retard uses a high speed RISC microcontroller to direct the timing functions. This controller can make extremely quick compensations to the timing while maintaining accuracy to within 1°. There is also an innovative Magnetic Pick-Up Compensation circuit built-in to allow for rock-steady timing with a variety of different mag pick-ups.There are four separate retard stages that can be activated independently or together for a total sum of retards.