Prove that a dive watch can be fun & functional with the CITIZEN ISO-certified Promaster Diver. With Eco-Drive technology, it is powered by light and never needs a battery, so you'll never need to open your caseback or compromise your dive again. Featured with stainless steel case, dark blue polyurethane strap and dark blue dial. With aluminum ring on bezel, one-way rotating elapsed time and WR200. Featuring our Eco-Drive technology powered by light, any light. Never needs a battery. Caliber number E168.