◆ Product Contents ◆ Sauna Ikitai Model Sauna-goer's watch Color... Black ◆ Product Overview ◆ ◯ Time display (hour, minute), 12-minute timer (minute, second), reset function ◯ Water resistance / 5-bar water resistance ◯ Body size / Weight Approximately 40.2 x 35.4 x 12.9mm (height x width x thickness) / Approximately 24.5g ◯ Exterior specifications Resin case (low moisture-permeable resin), resin back cover (low moisture-permeable resin), mineral glass ◯ Stretch curl band / Urethane resin ◯ Battery used / Battery life / Heat-resistant battery / Approximately 5 years ◯ Usable environment / Sauna up to a set temperature of 100°C (use within 15 minutes while wearing on the wrist) ※ Shipping may be delayed due to travel, but thank you for your understanding.