CASIO Collection SAN-100H-1BJR Unisex Black Watch (Japan Model)
Product Description
Discover the Casio “Sa Tokei”, a wristwatch specially designed for sauna enthusiasts. Engineered to perform in high-heat, high-humidity environments, it offers easy switching between Sauna Mode and Time Mode at the touch of a button, plus a 12‑minute sauna timer so you never lose track of your session. A simple, high‑contrast dial with luminous hands ensures legibility even in dim sauna rooms.
The Sa Tokei is safe to wear in saunas up to 100°C for up to 15 minutes on the wrist, with 5‑bar water resistance and a heat‑resistant battery (BR1225A) that delivers approximately 5 years of life (from production, using a monitor battery). Its structure minimizes heat transfer to sensitive internal parts, and the resin case and band help reduce the risk of burns; the only metal screw is positioned so it does not touch the skin. Low‑moisture‑absorption resin materials also help prevent fogging inside the watch.
Inspired by traditional sauna locker keys, the distinctive curl band gives the watch a playful, recognizable look that works both in the sauna and in everyday life. Simple, sauna‑focused button layout makes operation intuitive and stress‑free, enhancing your overall sauna experience.
Key Features:
- 5‑bar water resistance
- Usable in saunas up to 100°C (on the wrist, for up to 15 minutes per session)
- 12‑minute sauna timer (Sauna Mode)
- Luminous hands for visibility in low light*
- Battery life: approx. 5 years (monitor battery, calculated at 3 sauna uses/day: 23 h Time Mode, 1 h Sauna Mode)
- Accuracy: ±15 seconds per month (at normal temperature)
- Battery type: BR1225A
* Luminous performance varies depending on the intensity and duration of prior light exposure. Rapid cooling after sauna use may cause temporary fogging; if it clears within a few minutes, this is not a malfunction. Do not use in other high‑temperature environments, and limit sauna use to 15 minutes at a time while worn on the wrist.
CASIO
