Features: Resin Case Bio-Based Resin Strap Quartz Movement Mineral Crystal Grey Dial Digital Display Shock Resistant 1/100-Second Stopwatch Countdown Timer Multi-Function Alarm Hourly Time Signal Flash Alert LED Backlight Full Auto-Calendar 12/24 Hours Display Month, Day And Date Display Screwed Case Back Buckle Clasp 100M Water Resistance Approximate Case size (L × W × H): 42.1 × 37.9 × 11.3 mm Approximate Case Diameter: 37.90 mm Approximate Case Thickness: 11.30 mm