Double LED lightLED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Solar powered World time31 time zones (48 cities + coordinated universal time), daylight saving on/off 1/100-second stopwatchMeasuring capacity: 5959.99-InchMeasuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondCountdown range: 100 minutesCountdown start time setting range: 1 second to 100 minutes (1-second increments, 1-minute increments) 5 daily alarms Hourly time signal Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) Battery level indicator Power Saving (display goes blank to save power when the watch is left in the dark) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeepingAnalog: 2 hands (hour, minute)Digital: Hour, minute, second, pm, month, date, day Accuracy:±15 seconds per month Approx. battery operating time:8 months on rechargeable battery (operation period with normal use without exposure to light after charge)19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case : 59.1 × 52.4 × 16.1mm Total weight : 195g