The EFD gives you the best of both worlds. You can sit part of the day, as you always have, but you can also stand and take advantage of all the health benefits that come with standing and moving around. You and your associates will become healthier and more productive. This bundle comes with an EFD arm and a Dual monitor mount. Your EFD mounts to your current desk or credenza. The tray can be folded up and the EFD can easily be swung out of the way when you want to use your desk. It includes clamp and grommet brackets to work with most desks and credenzas. The EFD will move up and down over 14" to get the most comfortable sitting and standing positions. The entire unit (including the keyboard tray and monitor) easily moves up and down with the gas-spring arm. The monitor height can be adjusted separately for the optimal ergonomic position. The EFD+2 - double monitor arm for converts the EFD floating desk to allow it to hold two monitors. The adjustable monitor mounts will move up and down separately from the keyboard tray and will hold up to two 24" monitors.