Ready, Set, Dive. An iconic name with a reinvented construction, the Citizen Promaster Aqualand ISO compliant watch with maximum depth memory, rapid ascent alarm, auto start dive mode and power reserve indicator with divers 200M, you won't want anything else when headed to the ocean. Stainless steel case compliment the ocean blue polyurethane strap and blue dial with a blue and red bezel. Featuring our Eco-Drive technology – powered by light, any light. It never needs a battery. Caliber number J250.