Dual display stopwatch with 10 lap memory, lap and cumulative times, up to 10 hours in 1/100 second. Shows fastest and slowest lap times. Countdown timer and repeat. Pacer mode adjustable from 10 - 240 counts per minute. Date and time with alarm. Uses CR2032 battery, ESPO code 205419. Battery included. Battery release hatch, no need for a screwdriver.