Photovoltaic Eco-Drive Crystal glass Waterproof for 200m diving Class 1 magnetic resistance Reverse rotation prevention bezel Screw lock crown Screw lock button Luminous (hands + index) Charge amount display function Charge warning function Overcharge prevention function Approximately 11 months operation when fully charged Date Display Quick date correction function Water depth measurement function Maximum depth memo (display) function Sudden ascent warning function Water sensing function Shock detection function