Mounting Brackets
Sit/Stand Desk Riser Three Level Hight Adjustable Lightweight Standing Laptop Desk Notebook/ Monitor Holder With Keyboard Tray

Three levels: Monitor Level + Keyboard/mouse level+Base
put your screen (monitor or laptop) on the top level + your keyboard and mouse on the keyboard level, all within a small footprint! The keyboard level pulls out 7.5 inches towards you for even more comfort. So when you are standing, you can adjust your keyboard height, as well as the distance from you to exactly the perfect setting. And when you are ready to sit down for a while, simply remove the support leg, lower the keyboard level to a flat setting, and then lower the monitor level. The keyboard and monitor level adjust independently of each other, so that you can set each to your correct height.