Proof that a dive watch can be fun and functional with this Citizen ISO-compliant Promaster Marine. Powered by Eco-Drive technology, this watch never needs a battery. Featuring a one-way rotating elapsed time bezel, screw-down crown and blue polyurethane strap. Classically rugged and understated with its clean stainless-steel case, blue dial, and blue bezel, this watch will let you reach your limits and provide your life with the adventure you are searching for.