• Quickly tune-up cars, trucks, marine and recreational vehicles • Works on conventional, electronic and computer controlled ignition systems on both adjustable and nonadjustable timing systems • Patented Skip circuitry - Tests up to 10,000RPM • Dial type timing advance (0˚- 60˚ score) • Heat resistant metal inductive pick-up • One handed operation • Detachable leads for easy replacement and use • Protective hand guard for added safety • Rotating barrel for better aim at timing mark • Easy access slim-line barrel • Optical correct lens