Our Slimline Series atomic model offers a traditional classic perfect for customers seeking impeccable accuracy. This clock is equipped with the latest radio controlled movement receiving a daily signal from the National Bureau of Standards in Colorado. Non-yellowing 12” white dial face features bold, easy-to-read Arabic numerals, 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. All Chicago Lighthouse clocks are assembled in Chicago, Illinois by people who are legally blind. One AA battery required (not included). Hanging hardware included.