Waekon offers their 76760 kV/Arc Quick Probe for measuring and comparing peak kV or verifying the proper firing of the secondary ignition system. By placing the tool's probe over the ignition wire, it can detect when spark firings, which produce a flash of the super bright LED strobe. You then press a button and the unit measures and displays peak kV on an LCD display. The goal of the tool is to determine if the secondary ignition is firing consistently, intermittently misfiring or not firing at all. The 76760 can also help indicate spark polarity on DIS systems, detect problems caused by faulty wires, plugs, caps, rotors or coils, and works on distributor and DIS systems. The battery-operated tool is backed by a limited lifetime warranty and is made in the USA.