The INNOVA Pro Digital Timing Light is the professional choice for a high-quality timing light that will stand up daily shop use. Made from a heavy-duty, ABS, shock proof housing it has a molded boot for extra protection against the engine fan blades and a backlit screen for easier viewing in hard to see places. The slim, rotating barrel offers better aim at the timing mark. The four-function digital readout includes tachometer ranges from 249-9,990 RPM, Advance Degrees (2 and 4 cycle) 0-90 degrees, dwell (2-12 cylinders) from 0-180 degrees and voltage from 10-16 volts DC. Features Patented Skip Circuitry Test up to 9,990 RPM and switches from 2-cycle to 4-cycle. This timing light works with most ignition systems (DIS, conventional, electronic, and computer-controlled systems - domestic and import). The INNOVA Pro Digital Timing Light includes detachable 6-foot leads with inductive pickup and a plastic storage case.