Proof that a dive watch can be fun & functional with the CITIZEN ISO-compliant Super Titanium 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 in a Super Titaniumª case and bracelet, aluminum bezel and black dial, one-way rotating elapsed time and WR200. Featuring our Eco-Drive technology Ð powered by light, any light. Never needs a battery. Caliber number E168.