The Accutech DLi is the next generation in recording tachometers. It records the RPM 10 times a second up to a 1 hour period. Playback is at real time speed can be anything from a section of a lap to the entire race if required. You can also pause and rewind to view a certain point again. Double speed and 1/3 speed playback is also possible to see rapid RPM changes.This detailed RPM playback coupled with the inbuilt digital timer allows you to view your RPM at any point on the lap highlighting potential gearing issues or if traction out of a certain corner is an issue plus many other benefits.The tacho itself is lightweight and compact and uses stepper motor technology for needle stability and accuracy. A user settable 2 stage shift light is features as well as a settable sequential shift light.Compatible with most non-magneto ignition systems.4" Diameter Gauge0-10,000 RPMBacklit