[Warranty Service] Each watch has two-year warranty and 100% refund support within 30 days. If you have any questions about your watch, please feel free to contact us. Waterproof] 30 meters (3ATM / 98FT) waterproof and rainproof (excluding sauna, bathing and diving). [High quality material] Tempered crystal glass mirror, 18K alloy case, strong wear resistance. High-precision stainless steel strap, comfortable and durable, freely adjustable according to the size of the arm circumference. [Two places] When traveling abroad and traveling, you only need to set the overseas time on the small dial, which is very convenient. [Mechanical self-winding] Runs without a battery and automatically winds. However, if there is no movement for a long time, the mechanical kinetic energy is insufficient, so proper manual winding must be performed.