Features: Stainless Steel Case Bio-Based Resin Strap Quartz Movement Mineral Crystal Black Dial Digital Display Shock Resistant 1/100-Second Stopwatch Countdown Timer Hourly Time Signal Multi-Function Alarm Flash Alert LED Backlight Full Auto-Calendar 12/24 Hours Display Month, Day And Date Display Screwed Case Back Buckle Clasp 200M Water Resistance Approximate Case size (L × W × H): 48.9 × 42.3 × 13.1 mm Approximate Case Diameter: 42.30 mm Approximate Case Thickness: 13.10 mm