Men's Stainless Steel Black divers' watch his ISO certified Promaster Diver features a screw-back case and screw-down crown for reliable water resistance. Black textured dial. Silver-tone hands and markers and blue accents. Black ion-plated case. ISO certified. 180 day power reserve when fully charged. Solar powered so you never have to worry about replacing the battery. Black rubber strap. Date window at the 3 o'clock position. Screw-back case and screw-down crown. One-way rotating elapsed-time bezel. Non-reflective mineral glass crystal. Luminous hands and markers. Water resistant to 300 meters. Case width 47m.