GlowShifts Blue LED shift light is an essential accessory for every car enthusiast interested in that perfect shift. Each shift light is housed in a durable black metal pod and is a standalone unit that can be wired up to any vehicle with a 4, 6 or 8 cylinder gasoline engine. Its three wire connection makes for a fast and easy installation to the vehicles coil or tach signal wire. (It may be necessary to install a tach adapter for multiple coil applications.) The unit is easily adjustable using the dial on the back of the light allowing you to select between 3,000 to 12,000 RPMs. When you are at or above the desired RPM, the unit will flash indicating it is time to shift. It connects directly into its included pedestal mount allowing you to position the shift light in any desired location. GlowShift stands behind each shift light with a one year limited **and free technical support.