Case and bezel material:Carbon / Stainless steel Power supply and battery life:Tough Solar (Solar powered) Time adjustment:Bluetooth: Connects to a smartphone and automatically adjusts the time Smartphone Link feature:Mobile link (Wireless linking using Bluetooth) App connectivity feature:Auto time adjustmentEasy watch settingApproximately 300 world time citiesStopwatch data transferTimeandamp;amp; placePhone finder World time:World time 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping Stopwatch: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, lap/split time Timer:Countdown timerMeasuring unit: 1 secondCountdown range: 60 minutesCountdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)Other: Progress beeper Alarm/hourly time signal:5 daily alarms (with progress beeper)Hourly time signal Light:Double LED lightLED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Light color:LED:White Calendar:Full auto-calendar (to year 2099) Mute feature:Button operation tone on/off Energy saving feature:Power Saving (display goes blank to save power when the watch is left in the dark) Battery display/alert:Battery level indicator Run time:Approx. battery operating time:7 months on rechargeable battery (operation period with normal use without exposure to light after charge)18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy:±15 seconds per month (with no mobile link function) Other features:12/24-hour formatDay display (days of the week selectable in six languages)Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)Regular timekeeping:Analog: 2 hands (Hour, minute (hand moves every 20 seconds))1 dial (countdown alert) Digital: Hour, minute, second, pm, date, dayProgress beeper on/off Bracelet Case and bezel material:Carbon / Stainless steel Power supply and battery life:Tough Solar (Solar powered) Time adjustment:Bluetooth: Connects to a smartphone and automatically adjusts the time Smartphone Link feature:Mobile link (Wireless linking using Bluetooth) App connectivity feature:Auto time adjustmentEasy watch settingApproximately 300 world time citiesStopwatch data transferTimeandamp;amp; placePhone finder World time:World time 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping Stopwatch: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, lap/split time Timer:Countdown timerMeasuring unit: 1 secondCountdown range: 60 minutesCountdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)Other: Progress beeper Alarm/hourly time signal:5 daily alarms (with progress beeper)Hourly time signal Light:Double LED lightLED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Light color:LED:White Calendar:Full auto-calendar (to year 2099) Mute feature:Button operation tone on/off Energy saving feature:Power Saving (display goes blank to save power when the watch is left in the dark) Battery display/alert:Battery level indicator Run time:Approx. battery operating time:7 months on rechargeable battery (operation period with normal use without exposure to light after charge)18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy:±15 seconds per month (with no mobile link function) Other features:12/24-hour formatDay display (days of the week selectable in six languages)Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)Regular timekeeping:Analog: 2 hands (Hour, minute (hand moves every 20 seconds))1 dial (countdown alert) Digital: Hour, minute, second, pm, date, dayProgress beeper on/off