Mastering Engine Timing: My Expert Experience with Using a Timing Light Universal Timing Lights CARiD High Intensity LED Timing Light and Flash Light Proform Innova Professional Timing Light with 4 Function Digital Backlit LCD Performance Tool High Output LED Work Light. Checking the spark in relation to the piston ensures that your engine is firing as efficiently as possible. The Tac Style Shift Light from Proform allows you to check timing, help diagnose a no spark condition and check for electronic advance retard! Use with 2, 4, 6 and 8 cylinder applications. Featuring 1 wire inductive lead design and a high intensity LED thats visible in sunny conditions, which makes using this tool simple and easy to use. Running on a Li ion rechargeable battery, via mini USB C cable which is included, this light can also be used as an all purpose flashlight for use at home, car, or in the garage. The sleek machined aluminum body has a tactical inspired design that fits comfortably in hand for prolonged use. The head of the light features an O ring sealed tempered glass lens, designed for a tighter light beam to better aim at the timing mark. Weighing in at just under 10 oz, with a black anodized finish, this light has a sturdy construction that can stand up to the rigors of heavy use. Features: Rechargeable Battery w USB Cord Simple One Wire Hook Up Easy To Use High Intensity LED Billet Aluminum Construction Doubles as a Handy Glovebox Flashlight Sold As Each