Citizen Eco-Drive Perpetual Calendar Mens Watch - BL537451A

Citizen Eco-Drive Perpetual Calendar Men's Watch - BL537451A

Features:

• Perpetual Calendars
• 1/20 Second Chronograph - Measures up to 60 Minutes
• 12/24 Hour Time
• Dual Time
• Alarm
• Screw-Back Case
• All Stainless Steel Two-Tone
• Water Resistant to 666 ft.(200m)
• Safety Fold Over Clasp with Push Button
• Never Needs A Battery

Specifications:

• Movement Caliber: E81
  
• Maximum Power Reserve at Full Charge: 120 Days - 270 Days with Power Save
  
• Low Charge Warning: 5 Days
• Quick Start: No
• Charging Time From Stop State
  
  • Indoors, Office (500 Lux): 2 Hours
    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 incandescant light source 20" from the watch for charging a watch in this state. However, office light is sufficient for keeping your watch continually charged
    
  • Incandescant 20" (3,000 Lux): 43 Hours
    
  • Outdoors, cloudy (10,000 Lux): 12 Hours
    
  • Outdoors, Sunny (100,000 Lux) 4 Hour