Technical SpecsConstructionTriple G Resist (shock-resistant, resistant to centrifugal gravitational force and vibration-resistant)Water Resistance200 metersRadio Frequency77.5 kHz (DCF77: Germany); 60 kHz (MSF: UK); 60 kHz (WWVB: USA); 40 kHz (JJY: Fukushima, Japan) / 60 kHz (JJY: Kyushu, Japan); 68.5 kHz (BPC: China)Radio Wave ReceptionAutomatic reception up to six times a day (except for use in China: up to five times a day); manual receptionWorld Time29 cities (29 time zones; daylight saving on/off; daylight saving time (summer time) auto switching/ standard time and Coordinated Universal TimeStopwatch1/20-second stopwatch; measuring capacity: 120 minutes; auto-startCountdown TimerMeasuring unit: 1 second; countdown range: 120 minutes; countdown start time setting range: 1 to 120 minutesOther functionsAutomatic hands correction; daily alarm; full auto-calendar; battery recharge warningPower SourceTough Solar power system (solar-charging system)Continuous OperationAbout 27 months with the power-saving function* ON after full charge* Power-saving after a certain period in a dark locationSize of Case58.6 × 53.5 × 15.5 mmTotal WeightApprox. 188 g