Citizen Men's Titanium Eco-Drive Dive Watch PROMASTER: From Citizen's promaster collection this titanium dive watch is ISO compliant FEATURES: A 44 mm titanium case one way rotating bezel screw down crown and rubber strap LIGHT POWERED ECO-DRIVE: Converts any light whether natural or artificial into energy. Energy is stored in a permanently rechargeable power cell. The watch recharges continuously in any light to run forever with no battery changes required DIVER'S WATCH 200M: Wearable while scuba diving at depths not requiring helium gas UK APPROVED SUPPLIER: Comes With a 5-year Citizen UK warranty