Casio Men's DW290-1V Classic Alarm Chronograph Shock Resistant Sport WatchQuartz movement1/100 second digital stopwatch measuring modes: elapsed time split time 1st-2nd place timesHourly time signal calendar (pre-programmed until the year 2029) 12and 24 hour formatsAccuracy: +/-15 seconds per

Casio Men's DW290-1V Classic Alarm Chronograph Shock Resistant Sport WatchQuartz movement1/100 second digital stopwatch measuring modes: elapsed time split time 1st-2nd place timesHourly time signal calendar (pre-programmed until the year 2029) 12and 24 hour formatsAccuracy: +/-15 seconds per month battery CR2016 approx. battery life: 2 years