Seiko Astron GPS Solar Black Dial Men's Watch SSJ005J1

The world’s first GPS solar watch. By connecting to the GPS network, the Astron adjusts at the touch of a button to your time zone and, by taking all the energy it needs from light alone, never needs a battery change.

• Case Diameter: 39mm
• Case Thickness: 11mm
• Case Length: 46.2mm
• Glass: Sapphire crystal
• Case Material: Stainless steel (super hard coating) with ceramic bezel
  
• Band Material: Stainless steel
• Clasp with Smart Adjuster function
• Screw case back
• Automatic hand position alignment function
• Function to prevent the GPS signal reception (in-flight mode)
• GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment)
• Overcharge prevention function
• Perpetual calendar to the February 28, 2100
• Power save function
• Reception result display function
• Three-fold clasp with push button release
  
• Water Resistant: 10 BAR