展开Casio Watch: Casio GW2310-1 is Men's World Timers Digital Watch. This superb Casio G-Shock Men's watch comes with black plastic resin case and strap with buckle. Black dial with digital display. Tough Solar power, charges the battery with any light source. Shock resistant and water resistant to 200 meters. Full Auto EL Backlight with Afterglow. Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China). Receives time calibration radio signals which keep the displayed time accurate. Auto receive function (up to 6 times per day/up to 5 times per day for China). Manual receive function available. Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC. Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, China BPC 68.5kHz. World Time. 31 times zones (48 cities + UTC), city code display, daylight saving on/off. 4 Daily alarms and 1 Snooze Alarm. Hourly time signal. 1/100 second stopwatch. Measuring capacity: 23:59'59.99''. Measuring mode: Elapsed time, split time, 1st-2nd place times. Countdown Timer. Measuring unit: 1 second. Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments). Full auto-calendar (pre-programmed until the year 2099). 12/24 hour formats. Button operation tone on/off. Accuracy: +/- 15 seconds per month. Storage battery: Solar rechargeable battery. Battery power indicator and power saving functions. Approx. battery life: 10 months on full charge without further exposure to light.