Slimline, radio-controlled atomic wall clock features quartz-movement that keeps accurate time to within one second of deviation every 30 million years & automatically changes for Daylight Savings & back in the fall. Design features a plastic case, white face, easy-to-read black Arabic numbers, black minute & hour hands & a red second hand. Wall clock uses one AA battery (not included) & includes hanging hardware. Plastic case is made a percentage of post-consumer material & will biodegrade within 2 years in landfills.