Ultra-quiet clock - Precise quartz movement ensures accurate time display and silent sweeping seconds ensure a good sleeping and working environment. Simple design - display is precise and aesthetic, the large numbers are clear and practical, and it is easy to read the time. EASY INSTALLATION - The clock comes with an easy-to-use installation kit, just put on a small nail through the plastic hook, and the clock will hang securely on the wall in seconds with no dust on the wall and no plaster on the floor. Battery operation and the movement at Low-power quartz crystals require the use of one AA battery (not included). A good battery can be used for more than one year, and the system is energy-saving (Note: Insert the battery from the positive pole first, which is convenient to install the battery).