I agree, I've still got my Mychron 4 from when I had my kart, I love the lap timer on them. As Dirt said, it'll record high/low RPM per lap, give you the RPM drop per lap, active display of best lap time(if there is a timing beacon on the track), you can run a coolant temp or head temp sensor. It's a gauge, and a data logger all rolled into one.