Combining bold, powerful looks with high-tech innovation, this Seiko Prospex Diver’s Sumo Chronograph is as substantial and strong as its nickname suggests. The powerful solar battery is charged by both natural and electric light. At A Glance  Presented on a stainless steel bracelet with three fold clasp, push button release and extender 44.5mm stainless steel case with a black uni-directional rotating bezel and 200m water resistance Sapphire crystal Black dial with LumiBrite dot hour markers Date window at 4:30 Three chronograph sub-dials Battery charge indicator and overcharge prevention function Powered by a solar movement Up to 6 months battery life when fully charged