Features: Bio-Based Resin 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): 53.2 × 50 × 18.7 mm Approximate Case Diameter: 50.00 mm Approximate Case Thickness: 18.70 mm