HITO Silent Non-ticking Wall Desk Clock w/ Alarm AND Table Stand- 6 inches (NO3) Large numbers and glass front cover guarantee good view. Alarm Function. Quartz Sweep Movement guarantees accurate time and absolutely silent environment; Average battery can last about 6 months. Powered by one AA battery (not included). Please use average carbon battery, instead of high duty batteries. Table Stand included. And back nail slot offers easy installation.