Adjustable RPM Shift LightRange: 3,000 - 12,000 RPMStand Alone5" W x 2.75 H with BaseSilver With Amber Light Set shift point without a tachometer! Dial in desired shift point - light flashes on. At pre-set RPM, light will flash on. Range is 3- 12,000 (X200) RPM. No racing tach needed! Does not require separately purchased RPM modules! Some applications may need a late-model tach adapter.