AX 605 AX Pro Series Stopwatch is great for Event Timing . Extremly large digits for easy viewing on the field, track, or by the pooladd to the appeal of these stopwathces. Exclusive "AOS" Operating System with Twin Left-Right button operation feature its 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. Features: - AOS 4.5 Operating System - Ti - -In/Time-Out Event Timing - Timing Range 10 hours - Magnum liquid crystal display - 5 years battery life - Water Resistant - Packages include AX PRO Series Stopwatch, Lanyard, Battery, and Instructions.