Enjoy the tough and playful details of this men's casio g-shock solar-powered black resin strap watch with bluetoothâ® technology. The black dial features luminous hands, a mode indicator sub-dial, two-tier digital display and double led super illuminator backlight 45. 0mm black resin case with a carbon core guard structure and mineral crystal colorful accents add detail and contrast timekeeping functions include 12/24-hour time, alarms, full auto-calendar, stopwatch, timer and world time links to your smartphone with bluetoothâ® connectivity for more features japanese quartz movement; tough solar power recharges the battery black resin strap; buckle clasp water resistant to 200 metres; shock resistant we are an authorized casio dealer