Our Slim line series 12/24-hour model makes it easy to read standard or military time. Non-yellowing 12" white dial face features bold, easy-to-read black Arabic numerals for hours 1-12, red numerals for hours 13-24, black hour and minute hands and red second hand. Clock bodies are durable and biodegradable, made with 30% post-consumer recycled content. Lenses are shatter resistant and UV protected. Each clock is subject to our two-step testing procedure before being packaged. We back the quality and functionality of our clocks with a one-year limited . All Chicago Lighthouse clocks are assembled in Chicago, Illinois by people who are legally blind. One standard AA Alkaline battery required (not included). Hanging hardware included.