Citizen Promaster Men's Watch, Light-Powered Eco-Drive, Waterproof, SKY, Silver, CA4660-61A

[A pilot's watch with a compact 40mm case and a metallic sheen] The Citizen PROMASTER is a genuine sports watch that combines functionality, durability, and safety. This compact model features an aviation slide rule function yet still manages to achieve a 40mm case diameter. It boasts excellent visibility, ease of use, and a luxurious sheen. [Metallic Luster] The mirrored edges of the subdials and indexes create a three-dimensional impression. The lugs and crown guard of the case also feature a large mirrored surface, creating a metallic luster throughout the watch. In addition to the aviation slide rule scale, the 1/5-second chronograph scale is also finely marked, creating the precision you expect from a pilot's watch. [Human-friendly features and performance] Equipped with a solar-powered Eco-Drive system, it's hassle-free. It converts even the slightest amount of sunlight or light into electricity. Once fully charged, it continues to run for a long time even in the dark, eliminating the need for periodic battery replacement. Water resistance of 20 ATM makes it safe for waterworks and water sports. Convenient date display and luminous hands and indexes. [Product Details] Solar-powered Eco-Drive, accuracy of ±15 seconds per month, solar-powered: approximately 9 months, water resistance to 20 bar, sapphire crystal (anti-reflective coating), case/band: stainless steel, magnetic resistance grade 1, luminous (hands and indexes). *Detailed instructions for using the watch can also be found in the instruction manual on the manufacturer's website (model number: B620). [Charging Information] Eco-Drive uses light as its energy source. A single full charge will last for approximately nine months. We recommend fully charging the watch in sunlight when first using it. Also, when you take it off your wrist, store it in a place where it is exposed to light and other sources of light, so you can use it without worrying about it stopping.