Proof that a dive watch can be fun and functional with this Citizen ISO compliant Promaster Marine. With Eco-Drive technology, it is powered by light and 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 sleek, blue dial, and bezel, this watch will let you reach your limits and provide your life with the adventure you are searching for.