Casio Watch DW-6600-IV (630-5240) Specifications Faxback Doc. # 18727 Accuracy at normal temperature:......................+/- 15 seconds a month Timekeeping Mode:.................Hour, minutes, seconds, am/pm (P), month, date, day of the week Time system:.................Switchable between 12-hour and 24-hour formats Calendar system:..................Auto-calendar set at 28 days for February Alarm Mode:.................................Daily Alarm, hourly time signal Countdown Alarm Mode: Measuring unit:.........................................1/10 of a second Input range:.................................from 1 second to 60 minutes Stopwatch Mode:...........................Measuring unit: 1/100 of a second Measuring capacity:...................23 hours 59 minutes, 59.99 seconds Measuring modes:...............Elapsed time, split time and two finishes Others:........................Auto-start function, Target time function Other:..........Backlight function (flashes when an alarm or signal sounds) Battery:.................................One lithium battery (Type: CR2016) Approximately 2 years on type CR2016 (assuming alarm operation 20 sec./day with backlight function switched on and one backlight operation for 3 sec./day). The following shows approximations of how backlight operation affects battery life. 5 times/day: approximately 16 months 10 times/day: approximately 10 months (br/SP-12/26/95)