CASIO Sauna Watch SAN-100H-1BJR This is a waterproof Casio sauna watch, perfect for saunas, hot springs, rock baths, and public bathhouses. With a unisex design, it's easy to use, and the simple dial provides excellent visibility! It has a timer function, making it very convenient for managing sauna and bathing times. Guaranteed for use within 15 minutes while worn on the wrist, up to a set temperature of 100°C. The SAN-100H specifications are approximately 40.2 x 35.4 x 12.9 mm, with a weight of approximately 25g. * Model number: SAN-100H-1BJR * Unisex, for both men and women * Waterproof specifications, reset & mode function