The Innova 5568 professional timing light is made with 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. Built for one-hand use, the 5568 maximizes vehicle analysis efficiency and durability. The four function digital readout displays 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. 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.