This new color addition to the GW2310 model is cloaked in stealth black, highlighted by a black IP stainless steel bezel and reverse LCD display. The GW2310 has long been a favorite in the G-Shock lineup for its utilitarian look and rugged toughness.Standard features include five alarms, 1/100th second stopwatch, countdown timer and world time as well as full auto EL backlight, tough solar power system and Multi-Band 6 Atomic Timekeeping. Black resin band digital watch with black face.• Tough Solar Power • Multi-Band 6 Atomic Timekeeping • 200M Water Resistant & Shock Resistant Basic Information Case size (L× W× H) 52.5 × 46.4 × 15.6 mm Weight 69 g Case and bezel material Resin / Stainless steel Band Resin Band Construction Shock Resistant Water resistance 200-meter water resistance Time adjustment Radio-controlled Watch; Multi band 6 Power supply and battery life Storage battery: Solar rechargeable battery Tough Solar (Solar powered) Exterior Glass Mineral Glass Watch Features World time World Time31 times zones (48 cities + UTC), city code display, daylight saving on/off Stopwatch 1/100-second stopwatchMeasuring capacity: 23:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place times Timer Countdown timerMeasuring unit: 1 secondInput range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Alarm/hourly time signal 4 Daily alarms and 1 Snooze Alarm Hourly time signal Light Electro-luminescent backlight Full auto EL light, afterglow Light color EL:Blue Green Calendar Full auto-calendar (pre-programmed until the year 2099) Mute feature Button operation tone on/off Energy saving feature Power Saving Battery display/alert Battery power indicator Run time Approx. battery life: 10 months on full charge (without further exposure to light) Accuracy Accuracy: ±15 seconds per month Other features 12/24-hour format Time adjustment details Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China)Receives time calibration radio signals which keep the displayed time accurateAuto receive function (up to 6 times per day/up to 5 times per day for China)Manual receive functionSignal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPCFrequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, China BPC 68.5kHz
