CASIMA brand watch is designed for fashion pursuer.It specialized in sports/fashion/casual/ business watches. It is aimed at improving quality of life and bringing you unique lifestyle. Highlights: Original Japanese Quartz Movement: provide precise and accurate time keeping Roman Number Time Mark ,Scale Time Scale, Classic Business Casual Sport Design. Combines quality, leading edge fashion, and value. Stainless Steel Dial Case Back Cover Calendar Date Window 328T / 100M ,164FT/50M,Normal Water Resistant: Washing，swimming, daily use waterproof, not suitable for underwater activities - such as diving. Too much water contact will damage the watch’s movement. Features Waterproof Calendar Date Multi-functional, Chronograph strong luminous Material: Case Material: Stainless Steel Band Material: Stainless Steel, Leather , ceramic, silicone Mirror Surface: Sapphire Crystal, Hardlex mineral mirror **NOTE**: Please DONOT wear this watch when diving. Also avoid the use in extreme hot or cold temperature. If mist or droplets found inside watch surface, please contact manufacturer immediately for maintenance to prevent moisture corrosion of the internal components. Clean the strap by a soft cloth on regular bases is highly recommended. Too much water contact will shorter watch life.