As we are a Japanese shop, please take the following precautions when purchasing certain products. [Precautions when using electrical appliances] When using electrical appliances, please note that the voltage is different from that in Japan and may cause malfunctions. The plug type is Japanese type (A or B type), so please check the voltage before using a transformer. Please note that a transformer is different from a conversion adapter. We are not responsible for malfunctions caused by use without a transformer. [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. Model equipped with Eco Drive, which does not require battery replacement. [Thin model with a thickness of 4.8 mm] The flat case design, slender bezel, and delicate dial design give an elegant impression. [People-friendly functions and performance] Equipped with solar tech, no hassle. Converts a small amount of sunlight or light into electricity. Once fully charged, it will continue to operate for a long time even in the absence of light, so there is no need to regularly replace the batteries. Protect your precious watch with scratch-resistant and highly transparent sapphire glass. [Product details] Photovoltaic Eco Drive, ±15 seconds/month, Photovoltaic generation: Approximately 6 months, Water resistant for daily life, Case/Band: Stainless steel, Sapphire glass *For operating instructions, check the instruction manual on the manufacturer's website (Model number: G872). [About charging] Eco-drive that uses light as energy. Once fully charged, it will last about 8 months. When you first start using it, we recommend fully charging it under sunlight. Also, when you take it off your wrist, you can store it in a place where it is easily exposed to light, so you can use it in your daily life without worrying about it stopping.