Casio G-Shock Alarm World Time Quartz Analog-Digital Black 。G-Shock GMAS2100- 1A Analog/Digital- 42 inch New with Box Clear Black band and Silver/Gray Face Case size (L× W× H): 46.2 × 42.9 × 11.2 mm Weight: 41 g Case and bezel material: Carbon / Resin　 Band; Resin Band Construction;: Shock Resistant, Carbon Core Guard structure Water resistance: 200-meter water resistance Power supply and battery life: Approx. battery life: 3 years on SR726W X 2Glass: Mineral Glass Light: LED light,Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Light color: LED:Amber Calendar: Full auto-calendar Other Features: World Time, Stop watch, Timer