Accuracy at normal temperature: ± 15 seconds a monthRegular timekeepingHour, minute, second, am/pm, year, month, date and day... on its double displayTime system: Changeover between 12/24 hour formatsCalendar system: Auto-calendar pre-programmed to the year 2079Calculator mode8 digits (7 digits for

Accuracy at normal temperature: ± 15 seconds a monthRegular timekeepingHour, minute, second, am/pm, year, month, date and day... on its double displayTime system: Changeover between 12/24 hour formatsCalendar system: Auto-calendar pre-programmed to the year 2079Calculator mode8 digits (7 digits for negatives)Abilities: Four basic calculations, chain & mixed operations, constants for / - / x / ÷, power calculationDecimal point: Full floating with underflowOverflow check: Indicated by the "E" sign, locking the calculator modeStopwatch modeMeasuring capacity: 23 hours, 59 minutes, 59.99 secondsMeasuring unit: 1/100th of a secondMeasuring modes: Normal time, net time, lap time and 1st-2nd place timesDual time modeDaily alarm modeHourly time signalsBattery:(Module No. 437)One lithium battery (Type: CR-2016)Approx. 5 years of operation on type CR-2016 (Includes the alarm for 20 seconds and calculation for 1 hour per day)