Bosch's Inductive Timing Light is designed for standard base timing with on/off touch control. Simple and easy to use tool for measuring and setting initial timing, checking and measuring centrifugal advance, and measuring vacuum advance on gasoline powered vehicles. Works on vehicles equipped with conventional, electronic, computer controlled, DIS, or 2-cycle ignition systems. Features a super bright Xenon flash that makes it easy to see timing marks - even in daylight. The all-metal inductive pickup and durable ABS housing offer rugged reliability while heat resistant over molding on battery clips prevents burned fingers. Includes comprehensive instruction booklet. 1 year . Works on 6V and 12V vehicles (6V use requires a separate 12V automotive battery for power).