Structure:shockproof Power supply and battery life:Tough Solar (Solar powered) Smartphone Link feature:Mobile connection (wireless connection using Bluetooth) App connection feature:Automatic time adjustmentEasy time settingNearly 300 world time citiestime and spaceRemindingphone finder World time:World time 38 time zones (38 cities + coordinated universal time), automatic daylight saving time (DST) switching, home city/world time city switching Stopwatch:1/100 second stopwatch Measuring capacity: 00'00''00~59'59'­9;99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for first 60 minutes) 1 second (after 60 minutes) Measurement modes: Elapsed time, lap/split time Timer:Countdown timer Unit of measurement: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments) Alarm/hourly time signal:5 day alarmHourly time signal Light:Dual LED light LED light for face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Light color:LED: White Calendar:Fully automatic calendar (until 2099) Silence feature:Button operation tone on/off Energy saving feature:Power Saving (screen dims to save power when the watch is left in the dark) Battery indicator/warning:Battery level indicator Working time:Approximate battery operating time: 7 months on rechargeable battery (operation time in normal use without exposure to light after charging) 18 months on rechargeable battery (operation time when stored in complete darkness with the power saving function on after a full charge) Precision:Accuracy: ±15 seconds per month (without mobile connection function) Other features:Hand swipe feature (Hands move out of the way for unobstructed viewing of digital display contents.)12/24 hour formatDate/month display changeDay display (days of the week selectable in six languages)Normal timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hour, minute, second, pm, month, date, day Strap Structure:shockproof Power supply and battery life:Tough Solar (Solar powered) Smartphone Link feature:Mobile connection (wireless connection using Bluetooth) App connection feature:Automatic time adjustmentEasy time settingNearly 300 world time citiestime and spaceRemindingphone finder World time:World time 38 time zones (38 cities + coordinated universal time), automatic daylight saving time (DST) switching, home city/world time city switching Stopwatch:1/100 second stopwatch Measuring capacity: 00'00''00~59'59'­9;99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for first 60 minutes) 1 second (after 60 minutes) Measurement modes: Elapsed time, lap/split time Timer:Countdown timer Unit of measurement: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments) Alarm/hourly time signal:5 day alarmHourly time signal Light:Dual LED light LED light for face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Light color:LED: White Calendar:Fully automatic calendar (until 2099) Silence feature:Button operation tone on/off Energy saving feature:Power Saving (screen dims to save power when the watch is left in the dark) Battery indicator/warning:Battery level indicator Working time:Approximate battery operating time: 7 months on rechargeable battery (operation time in normal use without exposure to light after charging) 18 months on rechargeable battery (operation time when stored in complete darkness with the power saving function on after a full charge) Precision:Accuracy: ±15 seconds per month (without mobile connection function) Other features:Hand swipe feature (Hands move out of the way for unobstructed viewing of digital display contents.)12/24 hour formatDate/month display changeDay display (days of the week selectable in six languages)Normal timekeeping: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hour, minute, second, pm, month, date, day