• Atomic Timekeeping with Radio-Controlled Accuracy
• World Time in 26 Cities
• Perpetual Calendar
• All Stainless Steel
• Water Resistant to 666 ft. (200m)
• Sapphire Glass Crystal
• Fold-over Clasp with Hidden Double Push Button
• Never Needs a Battery

Specifications:

• Movement Caliber: H144
  
• Maximum Power Reserve at Full Charge: 180 Days
• Low Charge Warning: 3 Days
• Quick Start: No
  
• Charging Time From Stop State
  
  • Indoors, Office (500 Lux): 4Hours
    Usually, overhead office light is insufficient to achieve a full charge from a completely depleted power reserve. We recommend that you use natural outdoor light, or an incandescent light source 20" from the watch for charging a watch in this state. However, office light is sufficient for keeping your watch continually charged
    
  • Incandescent 20" (3,000 Lux): 150 Hours
    
  • Outdoors, cloudy (10,000 Lux): 40 Hours
    
  • Outdoors, Sunny (100,000 Lux): 30 Hours