Vestal Men's DDDS01 Digital Doppler Black Stainless Steel Watch with Rubber Strap Round watch in 3161 marine-grade stainless steel with chronograph, alarm, and calendar functions 50 mm black stainless steel case with mineral dial window Japanese quartz movement with digital display Silicone band with buckle closure Water resistant to 100 m (330 ft): In general, suitable for swimming and snorkeling, but not scuba diving