CASIO Sauna Watch SAN-100H-1BJR, black, brand new. This is the "Sauna Watch," a wristwatch for sauna enthusiasts. It features unique functions and a design that allows for safe use even in high-temperature and high-humidity environments. You can switch between sauna mode and normal time mode with the push of a button. Even those who lose track of time in the sauna can easily use the 12-minute timer in sauna mode. In addition, the simple dial and hands coated with luminous paint allow you to check the time even in a dark sauna room. It has heat and moisture resistance and can be worn safely in saunas up to 100°C. The heat-resistant battery makes it difficult for heat to reach the internal components, which are sensitive to heat. The exterior parts use resin to avoid burns, and the only metal screw is designed not to touch the skin. Resin that is resistant to moisture is used to prevent the inside of the watch from fogging up. The curl band, inspired by sauna locker keys, allows you to subtly feel the sauna even in everyday life. Please note that the tags and film have been removed at the store where it was purchased.