Eco-Drive Technology Charges in Sunlight or Indoors - No Batteries to Change Ever When fully charged has 270-Day Power Reserve Perpetual Calendar Autuomatically Adjusts for Months with 30, 31, 28 or 29 Days (Leap Year) through 2100 Date 1/20 Second Chronograph Measures up to 60 Minutes 12/24 Hour Time Alarm One way rotating elapsed time bezel Non-reflective mineral glass crystal is scratch-resistant Solid titanium case Genuine brown leather alligator grain strap with decorative top-stitching Hi-tech titanium is strong and 1/3 lighter than stainless Low Charge Indicator and Time Reset Advisory (Second Hand will Move in 2-Second Increments if Watch Ever Needs to Be Charged) 200 Meter Water Resistant