Blue Universe Collection The second collection showcases the brilliance of stars floating in space. The bezel and center links of the bracelet are coated with DLC blue. The black dial sparkles, symbolizing stars floating in a quiet, pitch-black universe. The combination of black and deep blue creates an exquisite and unique atmosphere. The simple indexes and hands shine brilliantly yet ensure excellent readability. No need for regular battery replacement Citizen's proprietary Eco-Drive technology converts sunlight or faint indoor light into electrical energy to power the watch. Once fully charged, the watch can operate for a long time even in darkness, eliminating the need for regular battery replacements. Scratch-resistant, lightweight, and rustproof Citizen's proprietary "Super Titanium" material is titanium metal treated with Duratect (surface hardening technology). It is 40% lighter than stainless steel but has a surface hardness more than five times that of stainless steel. Precise timekeeping at all times