CASIO, DIGITAL battery life: 3 years on

battery life: 3 years on SR726W

LED light (Super illuminator)Selectable illumination duration (1

battery life: 3 years on SR920SW

Mobile link (Automatic connection

1/100-second stopwatchMeasuring capacity:00’00″00~59’59″99 (for the first 60 minutes)1:00’00~23:59’59 (after 60 minutes)Measuring unit:1/100 second (for the first 60 minutes)1 second (after 60 minutes)Measuring modes: Elapsed time

CASIO, DIGITAL battery life: 3 years onLED backlightAfterglow Dual time 1 100 second stopwatchMeasuring capacity: 23: 5959. 99Measuring modes: Elapsed time, split time, 1st 2nd place times Daily alarm Hourly time signal Auto calendar (to year 2099) 12 24 hour format Regular timekeeping: Hour, minutes, seconds, pm, month, date, day Accuracy: ? 20 seconds per month Approx. battery life: 10 years on CR1620