This rugged digital workhorse from casio moves with ease from casual settings to work situations. White dial with easy-read display 51. 9mm bio-based resin, bio-based carbon and stainless steel case with mineral crystal shock-resistant carbon core guard structure functions include stopwatch, alarm, day/date, high-brightness led, full-auto calendar, and world time long-life 10-year battery black bio-based resin strap; buckle clasp water resistant to 200 meters we are an authorized casio dealer