Self-Powered Inductive Clamp Timing Light w/ 10ft lead The original battery powered timing light, built with quality to last. There’s no need to connect to a 12volt battery for power. Unit is powered by two “D” cell flashlight batteries. Great tool for marine, snowmobile, industrial, racing engines and other small engine timing. Features:. Accurate up to at least 14,000RPM. For 2 or 4 cycle engines, all ignition systems. Protective sleeve with stands high temps (1200F). Available with 10, 20, 30, 40 or 50ft lead lengths . Standard lead length 4feet. Bright flash at all speeds. Batteries included 130-10 Prop65 information pending -