Proof That A Dive Watch Can Be Fun & Functional With The Citizen Iso-Compliant 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 Stainless Steel With Azure Blue Aluminum Bezel And Matching Azure Blue Dial, One-Way Rotating Elapsed Time And Wr200. Caliber Number E168.