Dianoo Simple Creative Modern Alarm Clock - Candy Color Series - Room and Office Alarm Clock, Give You More Warm Feel - Green Non-ticking, silent clock. Large numbers guarantee good view. Flat lens covers clock face to protect from dust and debris Super-quality Quartz Sweep Movement guarantees accurate time and absolutely silent environment Powered by one AAA battery (not included). Please use average carbon battery, instead of high duty batteries Back nail slot offers easy installation