Xtreme Products Accu-Tach Racing Tachometer

Both the overall height and width measure a total of 3.13" For use with Magneto and Point Type Ignition distributors ONLY It is factory set for 8 cylinder engines and will function up to 15,000 RPM Designed to accept any standard alkaline 9 volt battery to function for many hours of operation This digital tachometer will work with 4, 6 and 8 cylinder engines using an MSD ignition or a magneto