Functionality and full-spectrum style combine in this men's Casio G-SHOCK solar-powered watch with Bluetooth® technology. 43mm black ion-plated stainless steel case with mineral crystal Original-style dial with digital display, LED Super Illuminator backlight and a blue and green gradient border Functions include stopwatch, alarm, day/date, time signals, full-auto calendar, and world time Connects to your smartphone via Bluetooth® technology for more features Digital movement with Atomic Timekeeping; Tough Solar power recharges the battery Black ion-plated steel bracelet with fold-over clasp Water-resistant to 200 meters; shock resistant