Smartphone Link FeatureMobile Link (wireless connection using Bluetooth) ApplicationsCASIO WATCHES App Connectivity FeatureAuto time adjustment, easy watch setting, approximately 300 world time cities + user-added points, timeandamp;amp; place, phone finder World Time2 world time cities, 38 time zones (55 cities + Coordinated Universal Time), city code display, city name display, daylight saving on/off, automatic daylight saving time (DST) switching, home city/world time city swapping Stopwatch1/100-second stopwatch, measuring range: 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 the first 60 minutes and 1 second after 60 minutes, measurement modes: elapsed time, split time, 1st and 2nd place times TimerCountdown timer, measuring unit: 1 second, countdown range: 24 hours, countdown start time setting range: 1 second to 24 hours (in 1-second increments) Alarm / Hourly Time Signal5 daily alarms (including 1 snooze alarm), hourly time signal LightLED backlight, full auto light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Light ColorLED: White CalendarFull auto-calendar (up to year 2099) Mute FeatureButton operation tone on/off Power Saving FeaturePower Saving (display darkens in the dark to save power) Battery Indicator / WarningLow battery warning RuntimeApproximate battery operating time: 6 months on rechargeable battery under normal use after full charge, 22 months in total darkness with power saving function enabled after full charge AccuracyAccuracy: ±15 seconds per month (without signal calibration and mobile link function) Other Features12/24-hour format, date/month display swapping, regular timekeeping: hour, minute, second, PM, month, date, day, Memory in Pixel (MIP) LCD Time Adjustment DetailsTime calibration signal reception, automatic reception up to six times per day (remaining auto receptions cancelled after successful reception), five times per day for Chinese calibration signal, manual reception, latest signal reception results Time Calibration SignalsDCF77 (Mainflingen, Germany) – 77.5 kHzMSF (Anthorn, United Kingdom) – 60.0 kHzWWVB (Fort Collins, United States) – 60.0 kHzJJY (Fukushima, Fukuoka/Saga, Japan) – 40.0 kHz / 60.0 kHzBPC (Shangqiu City, Henan Province, China) – 68.5 kHz Date Bracelet Fixed Smartphone Link FeatureMobile Link (wireless connection using Bluetooth) ApplicationsCASIO WATCHES App Connectivity FeatureAuto time adjustment, easy watch setting, approximately 300 world time cities + user-added points, timeandamp;amp; place, phone finder World Time2 world time cities, 38 time zones (55 cities + Coordinated Universal Time), city code display, city name display, daylight saving on/off, automatic daylight saving time (DST) switching, home city/world time city swapping Stopwatch1/100-second stopwatch, measuring range: 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 the first 60 minutes and 1 second after 60 minutes, measurement modes: elapsed time, split time, 1st and 2nd place times TimerCountdown timer, measuring unit: 1 second, countdown range: 24 hours, countdown start time setting range: 1 second to 24 hours (in 1-second increments) Alarm / Hourly Time Signal5 daily alarms (including 1 snooze alarm), hourly time signal LightLED backlight, full auto light, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Light ColorLED: White CalendarFull auto-calendar (up to year 2099) Mute FeatureButton operation tone on/off Power Saving FeaturePower Saving (display darkens in the dark to save power) Battery Indicator / WarningLow battery warning RuntimeApproximate battery operating time: 6 months on rechargeable battery under normal use after full charge, 22 months in total darkness with power saving function enabled after full charge AccuracyAccuracy: ±15 seconds per month (without signal calibration and mobile link function) Other Features12/24-hour format, date/month display swapping, regular timekeeping: hour, minute, second, PM, month, date, day, Memory in Pixel (MIP) LCD Time Adjustment DetailsTime calibration signal reception, automatic reception up to six times per day (remaining auto receptions cancelled after successful reception), five times per day for Chinese calibration signal, manual reception, latest signal reception results Time Calibration SignalsDCF77 (Mainflingen, Germany) – 77.5 kHzMSF (Anthorn, United Kingdom) – 60.0 kHzWWVB (Fort Collins, United States) – 60.0 kHzJJY (Fukushima, Fukuoka/Saga, Japan) – 40.0 kHz / 60.0 kHzBPC (Shangqiu City, Henan Province, China) – 68.5 kHz