Silent timing mechanism provides accurate and quiet operationPrecision quartz movement ensures accurate time, and the silent frequency sweep ensures a good learning and working environment.Product name: Wall clockprompt:1. Due to the difference of light and shooting angle, there may be slight chromatic aberration, please understand.2. Please confirm the size of the clock before purchasing.3. The product picture only contains the clock and does not contain other products.4. Do not use alkaline batteries to avoid damage to the movement.5. Manually measure the size, there may be some small errors, please refer to the actual product, thank you.6. Do not use hard cleaning tools to clean the product, so as not to scratch the surface of the product.7. Welcome to share and feedback, we can provide you with better products and services.8. If you find any problems with our products, please feel free to contact us via email, we will solve these problems as soon as possible.