The Snap-on Ultra-Light Timing Light (No. EETL500) is a multi-purpose tool capable of measuring engine RPM, checking battery voltage and measuring secondary firing voltages and burn times. The new timing device not only features a diamond plate underside and large backlight LCD screen, it also has a dual LED flashlight in the patented pivoting head. The EETL500 not only provides measuring and timing functions, it also measures and displays kV readings, and performs ignition timing and systems tests.