Track the Service Life and RPM of Your Vehicle -oil changes, valve adjustments, spark plugs etc...
*Easy Installation -peel & stick, no wiring necessary, or attach with enclosed hardware.
*No Battery Required -connects to spark plug wire.
*Works on Any Gas engine up to 2 cylinders and 8000 rpm.
*Firing pattern 1 spark = 1 rpm
*Resolution 10 RPMs
*Maximum RPMs 8000
*Suitable for all single and twin, two or four cycle gasoline engines operation within specified tachometer firing pattern.
*100% epoxy encapsulated
*Warranty one year.
