AX 705 AX Pro Series Stopwatch, our Ultimate Lane Timer, is your choice if you want error-free timing. You can't mess it up! Extremly large digits for easy viewing on the field, track, or by the pool add to the appeal of these stopwathces. The AX 705 has Exclusive "AOS" Operating System with Twin Left-Right button operation feature, designed to give coaches, athletes, and timers the most precise timing available. All AX Pro Series Stopwatches are cased in Accusplit's distinctive, ergonomic designed "X" Case.