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 diver 200M, you won't want anything else when headed to the ocean. Stainless steel case and bracelet compliment the black dial with bright orange bezel. Featuring our Eco-Drive technology ? powered by light, any light. Never needs a battery. Caliber number J250.