Seiko Mens Premier Kinetic Perpetual Calendar Watch SNP153P1
Perpetual calendar - Once set, the calendar automatically adjusts for odd and even months including February of leap years up to February 28, 2100
Automatic kinetic power generator - powered by the motion of your wrist
When the watch senses 24 hours of inactivity it puts itself into suspended animation (sleep mode) to conserve energy. The date continues to advance correctly while the watch is asleep. Wake it up with a few shakes of your wrist and it automatically resets itself to the correct time even if its been asleep for up to four years. Watch comes with a Seiko Presentation box.