AX 740BL AX Pro Memory Series Stopwatches are professional timing devices with significantly increased functionality going beyond our tremendously successful Classic X WOS Series, The AX 740BL comes with Super continuous on Backlight that stays on for 10 minutes with each push of the backlight button, Exclusive AOS 4, 5 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 Accusplits distinctive, ergonomic designed X Case, The watch uses a rechargeable battery, and comes with a recharging kit, including attachments for wall outlet, car, and USB charging, AOS 4, 5 Operating System, 50 Dual Split Memory, Super Backlight, Lap and Total Speed, Agverage Split Compute, Dual Split Lap and CUM, 1 Button Rapid Split and Reset, Split Counter, 1,2 Fast Finish, Timing Range 30 hours, Event Timing, Dual liquid crystal display, 1, 5 year battery life and low battery indicator, Water Resistant and Fail Safe Reset, Packages include AX PRO Memory Series Stopwatch in Black Case, Lanyard, charger kit, and Instructions, Stopwatches: Ax Pro Memory Series, Case Style: X Case, Timing Range Hours: 10 Hrs, Timing Interval: 1100 Sec, 1,2 Fast Finish: Yes, Event Timing Time Out: Yes, Splits Display and Function:, Lap and Cum Splits: Lap and Cum, Split Memories: 50, Split Counter: Yes, Average Split Compute: Yes, Splits Action:, 1 Button Start, Rapid Split, and Reset Action: Yes, Miscellaneous Functions and Features:, Warranty: 5 Years, Operating System: AOS, No Fail Switches: Yes, Battery Life: 1, 5 Years, Low Battery Indicator: Yes, Display: Multifunction, Fail Safe Reset: Yes, Water Resistant: 30M 100ft, , Colors: Black, Special Features: Super Backlight, SKU: ACPLT053