The chrono 100 is our top of the line model. It is the best choice for coaches, serious athletes, and racers who need to record multiple lap times. Great for marathon runners, triathletes, and for those who want to monitor races or workouts lap by lap. It also has a pause feature, so you can interrupt your workout without throwing off your timing statistics. Accent color hands-free operation water resistant up to 50 meters accurate to 1/100 second lap count up to 999 elapsed time, split times fastest, slowest, and average lap times 100 individual lap times pause ability