Casio Waveceptor Executive Chronograph Mens Watch WVQ600DCA-9AV Multi-Band Atomic Timekeeping (US, Japan), Tough Solar Power, 100M Water Resistant Dual Time, Daily Alarm, 1/20 second chronograph Auto Calendar (pre-programmed until the year 2099),Accuracy: +/-15 seconds per month (with no signal calibration) Storage Battery CTL1025, Power Saving Function, Approx. battery life: 4 months on full charge (without further exposure to light) Module 4350, Size of case: 46.2 x 43.2 x 11.7mm