The Kangaroo Pro Junior is a height-adjustable work surface. You can set a monitor on it, or you can attach the monitor to the VESA bracket. , The work surface and monitor mount adjust independently. I've used it by sitting a monitor on the work surface and my laptop as well on the worksurface, plugging my laptop into my monitor. I can easily switch from sitting to standing and back again by adjusting the height. It is described at this link: https://www.ergodesktop.com/kangaroo-pro-junior. It is in excellent condition. Sells for $400 new.