270-Day Power Reserve Eco-Drive Technology Charges in Sunlight or Indoors - No Batteries to Change Ever 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 Stainless Steel Case and Bracelet Low Charge Indicator and Time Reset Advisory (Second Hand will Move in 2-Second Increments if Watch Ever Needs to Be Charged) Fold-Over Push Button Safety Clasp 100 Meter Water Resistant