Using advanced microcircuitry, the Pro-Shift Lite can trigger your shift point without a tachometer.  The shift-point is selected by inserting a precisely calibrated rpm module (Pill) into the unit.  The amber light activates when the engine reaches the chosen rpm.  State-of-the-art, low current circuitry makes this ideal for battery operation.  Models are available for Standard/Electronic, Vertex, and Super Mag ignitions.  A variety of clearly marked rpm modules "Pills" are available.  For different colored lenses and night covers, see the Colored Lens Kits section.