The Reactor Ion is a truly unique watch that combines the extreme durability and performance common to every Reactor watch with a beautiful and innovative design worthy of any collector's collection. The Ion employs a kinetic quartz movement with an exhibition case back, so it generates its own electricity and will never need a battery replacement. The lugs of the watch - where the bracelet attaches to the case - actually rotate to completely conform to the shape of your wrist and the links feature soft, rounded edges for comfort. The most unique feature is the crystal, which viewed from the side is wave shaped. Model RE-80005