HITO153; 12 inches Silent Non-ticking Metal Frame Quartz Wall Clock w/Front Glass Cover (Black) Large numbers and front glass cover guarantee good view. Super-quality Quartz Sweep Movement guarantees accurate time and absolutely silent environment; CE certificated. Average battery can last about 6 months. Mental Frame (smooth and elegant) is more solid and classic. Powered by one AA battery (not included). Please use average carbon battery, in stead of high duty batteries. Back nail slot offers easy installation.