Structure:TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant)Carbon Core Protection structure Time adjustment:Radio Controlled Clock; Multiband 6 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 spaceClock status indicatorself controlphone finder Surface treatment:Blue ion plated framePurple ion plated frame World time:Dual time 27 time zones, Home city time change, automatic daylight saving time (DST) change Stopwatch:1-second stopwatch Measuring capacity: 23:59'59. Measurement modes: Elapsed time, split time Timer:Countdown timer Unit of measurement: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1 second increments) Alarm/hourly time signal:daily alarm Light:LED light (Super Illuminator) Afterglow Light color:LED: White Calendar:Fully automatic calendar (until 2099) Hand home position correction feature:Automatic hand home position correction Energy saving feature:Power Saving (hands stop to save power when the watch is left in the dark) Battery indicator/warning:Battery level indicator Working time:Approximate battery operating time: 5 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 signal calibration) Other features:Normal timekeeping: Analog: 3 hands (hour, minute (hand moves every 5 seconds), second), 3 dials (dual time hour and minute, dual time 24 hour, day) Time adjustment details:Time calibration signal reception Automatic reception up to six* times per day (remaining automatic receptions are canceled as soon as one succeeds) *Manual reception 5 times per day for China calibration signal Latest signal reception resultsTime Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68, 5kHz Strap Structure:TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant)Carbon Core Protection structure Time adjustment:Radio Controlled Clock; Multiband 6 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 spaceClock status indicatorself controlphone finder Surface treatment:Blue ion plated framePurple ion plated frame World time:Dual time 27 time zones, Home city time change, automatic daylight saving time (DST) change Stopwatch:1-second stopwatch Measuring capacity: 23:59'59. Measurement modes: Elapsed time, split time Timer:Countdown timer Unit of measurement: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1 second increments) Alarm/hourly time signal:daily alarm Light:LED light (Super Illuminator) Afterglow Light color:LED: White Calendar:Fully automatic calendar (until 2099) Hand home position correction feature:Automatic hand home position correction Energy saving feature:Power Saving (hands stop to save power when the watch is left in the dark) Battery indicator/warning:Battery level indicator Working time:Approximate battery operating time: 5 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 signal calibration) Other features:Normal timekeeping: Analog: 3 hands (hour, minute (hand moves every 5 seconds), second), 3 dials (dual time hour and minute, dual time 24 hour, day) Time adjustment details:Time calibration signal reception Automatic reception up to six* times per day (remaining automatic receptions are canceled as soon as one succeeds) *Manual reception 5 times per day for China calibration signal Latest signal reception resultsTime Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68, 5kHz