[NIGHT COLOR EDITION] The popular models of the Citizen collection, which pursues the basic performance and design of watches, are unified in black color. A cool impression with an impact is attractive. Equipped with a world time function that displays time differences around the world, this model is also highly functional. [High-impact design with high visibility] A large 43mm case with a three-dimensional dial part and thick hands, giving it a strong presence. It goes well with a variety of occasions and fashions, from business to casual. [Citizen's radio-controlled clock that keeps accurate time at all times] Equipped with Citizen's proprietary light-powered Eco Drive technology that eliminates the need for regular battery replacement. A world time radio clock that synchronizes to accurate time no matter where you are. It is filled with radio-controlled clock technology that Citizen has been challenging for 30 years. [Invention for long-term use] We have pursued improvements in durability because we want it to be used for a long time. Water resistant to 10 ATM, scratch-resistant and highly transparent sapphire glass with anti-reflective coating to prevent light from reflecting on the glass surface. Protect your precious watch in all situations. [Product details] Photovoltaic Eco Drive radio clock, ±15 seconds/month (when not receiving data), Photovoltaic generation: Approximately 2 years (when power save is activated), Water resistant to 10 ATM, Case/Band: Stainless steel , Sapphire glass (non-reflective coating), Luminous (hands + index), Perpetual calendar, Radio reception in Japan, China, America and Europe, Type 1 magnetic resistance *You can also check the operating instructions from the instruction manual on the manufacturer's website (model Number: H145).