Solo lap timer identifies the track you are at automatically. Tracks not programmed can also be easily added. Solo can be used in race mode, showing previous lap times. It also be used for 0-60mph 1/4 miles, 1/8 miles imperial or metric 0-100km/h 400m, 1000m. Just switch on and go, great piece of kit. £300 new. Comes with original box, and manual. £120 + £5 P&P Paul