Features: Bio-Based Resin Case Bio-Based Resin Strap Tough Solar Mineral Crystal Black Dial Digital Display Low-Temperature Resistant Radio-Controlled Watch Multi Band 6 Altimeter Auto Log Data Trek Log Data Barometer Digital Compass Graphic Direction Pointer Magnetic Declination Correction Bearing Memory Thermometer Home Time/World Time Swapping Sunrise, Sunset Time Display Black Ion Plated Bezel 1/10-Second Stopwatch Countdown Timer 5 Daily Alarms Hourly Time Signal LED Backlight Full Auto-Calendar Button Operation Tone On/Off Power Saving Battery Level Indicator 12/24 Hours Display Month, Day And Date Display Bidirectional Rotating Bezel Screwed Case Back Buckle Clasp 100M Water Resistance Approximate Case size (L × W × H): 51.2 × 44.6 × 13 mm Approximate Case Diameter: 44.60 mm Approximate Case Thickness: 13.00 mm