Size: 21.7"*9.5"(55cm*24cm) Ergonomic design Extend the desktop horizontally, fully support the arms to relax the upper limbs and improve working conditions. Improve the design many times to find the best ergonomic solution. Fabulous space Installation You can fold it down when you don't need to use it, saving space. When used at work, you can place more items such as keyboard, notebook, mouse, etc. to increase the use space. Easy Installation According to the installation instructions, quick installation. The whole process only takes 5 minutes, which is convenient. Non-hole installation ensures that the desktop is intact. Better Compatibility This extension board is better compatible with common right-angle office desktops than similar products on the market. Whether it is the side or front of the desk, it can be perfectly connected.