This new data logging tachometer is perfect for competition racers. It allows the user to log and playback runs easily. With 390 minutes of internal memory, it provides the opportunity to record up to 50 runs. The heated screen allows it to be used in winter conditions. The programmable shift light can be programmed either as a shift light or RPM redline warning light. The programmable piston setting allows its use on about any 2 or 4 stroke engine. This is an extremely useable tool to help fine tune clutching and find proper gear ratios. The external thumb switch can be added as an option. (See "Related Items" tab above)