Hippih 12 Inch Silent Non-ticking Wall Clock- Metal Frame Glass Cover Large numbers guarantee good view. Super-quality Quartz Sweep Movement guarantees accurate time and absolutely silent environment; Average battery can last more than 1 year. Powered by one AA battery (included). Please use average carbon battery, instead of high duty batteries. Back nail slot offers easy installation. Thermometer and hygrometer: clock face design with a thermometer and hygrometer.