SKILCRAFT SelfSet clocks are programmed to automatically set itself to daylight saving time without the use of a signal. It is ideal for use in facilities where a radio signal may not reach radio controlled clocks. Clocks have quarts movement with extremely accurate time (+/- 2 minutes per year) and include a white dial with black Arabic numerals, black hour and minute hands - plastic clocks feature a red second hand and, a shatter-resistant UV-protected clear lens and come with hanging hardware - the bodies will biodegrade on average within 2 years in landfill; black and brown bodies have 30 percent post-consumer recycled content. Compliant with 2007 Daylight Savings regulations. Battery-operated movement uses one AA battery (not included). 12-3/4-inches diameter. Color: black, white face. SKILCRAFT - made with Pride by Americans who are Blind. Choose SKILCRAFT for quality products with a purpose. SKILCRAFT - every purchase creates jobs for Americans who are blind.