Tiny-Tach™ Tachometer and hour meter for gas engines. Can be programmed for different engines. RPM to 19,990. Updates every 1/2 second. High RPM recall. Contains tachometer, hour meter, two service timers, job timer and max RPM. All menu controlled. Standard wire length is 6 feet. Allow 2-3 weeks for custom orders. Estimated battery life is 5+ years — not replaceable