Designed for divers\, the Casio G-Shock GWF1000-1 Frogman Tough Solar Digital Men's Watchfeatures ISO 200m diving water resistance\, dive time\, surface interval\, tide and moon data with full Auto EL Backlight with Afterglow for safe underwater experience. Its asymmetrical case design ensures lack of interference with the back of the hand\, while frequently used buttons\, such as the mode button\, are large and easily operated with gloved hands.ToughCasio G-Shock watches are designed to beat the odds. The Frogman offers an additional protection - its metal case is coated with a hard amorphous carbon film comprising carbon and hydrogen to harden the surface and increase its abrasion resistance. Insertion of high tensile strength carbon-fiber into the resin band material protects the band against cuts and tears. The band can be lengthened for wear over a wet suit sleeve. What's more\, the incorporated Tough Solar technology ensures stable operation while using power-hungry functionsMulti-Band 6 Atomic TimekeepingThis self adjusting watch receives time calibration signals and corrects the time automatically. Casio watches with Wave Ceptor technology receive radio waves carrying American Standard Time data transmitted from Fort Collins\, Colorado. It then corrects the time automatically for one of four U.S. cities you pre-select depending on your time zone and displays the time wherever you go from coast to coast!