Thank you for viewing this product from among many others. Sa-Tokei SAN-100H-1BJR Black This is a new, unused item. It will be shipped via Mercari delivery, wrapped in bubble wrap. [Product Details] Case size (length x width x thickness) 40.2 × 35.4 × 12.9 mm Weight 25 g Case/Bezel Material Resin Band Resin Water Resistance 5 ATM water resistance Power Supply/Battery Life Battery life: Approximately 5 years Accuracy Average monthly difference: ±15 seconds Other Usable environment: Sauna up to 100°C (use within 15 minutes while wearing on the wrist) Glass Mineral glass Band Attachment Possible Size Free This is a wristwatch for sauna enthusiasts, the "Sa-Tokei". It has unique functions and design so that you can use it with peace of mind even in high temperatures and humidity. You can switch between sauna mode and normal time mode with a single button. Even those who forget how long they've been in the sauna can easily use the 12-minute timer in sauna mode. Also, you can check the time even in a dark sauna room with a simple dial and hands coated with luminous paint. It has heat and moisture resistance and can be worn safely in saunas below 100°C, and the heat-resistant battery makes it difficult for the temperature to reach the internal components that are vulnerable to heat. In addition, 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. *The duration and brightness of the luminous paint will vary depending on the intensity and duration of the light it absorbs. *If the watch is rapidly cooled after entering the sauna, it may fog up, but this is not a malfunction if it disappears within a few minutes. *Please refrain from using it in high-temperature environments other than saunas. Also, in saunas, please use it within 15 minutes while wearing it on your wrist. Color...Black系 (Black-based)