what do you use the cable on this for?
Is this a Laser Tachometer
Open Reply - John the Car-Doc
This Electronic Specialties EZ Tach Plus (Part No. ESI328) can measure RPM on a wide variety of engines from string trimmers to automotive. Reads engine revolutions from 0 to 20,000 RPM, Picks up RPM signal wireless or with supplied inductive pickup, Built-in LED Flashlight which can be used while taking measurements, Backlit LCD display, Accuracy +10 RPM. For any further assistance please feel free to call 1-877-238-2623 and one of our representatives will gladly assist you with any questions or concerns you may have.
Open Reply - Captwingfoot
The Cable is used to clamp around the spark plug wire and plug the other end into the tachometer if it is not convenient to hold the tachometer close to the plug wire. No it is not a optical device.