Compatible with LX Tall Poles: Upgrade your LX Desk Arm, Tall Pole (45-537-224) to a dual monitor setup or expand your LX Dual Stacking Arm, Tall Pole (45-509-224) to hold three or four displays; additional monitors may reduce maximum weight capacity Easy installation: Includes LX arm, extension, pole collar, cap and attachment hardware; attaches anywhere to the pole of the LX desk mount base to hold additional monitors Boosts productivity: Create a flexible yet stable two, three or four-monitor workstation to dramatically increase workflow efficiency; ideal solution for gaming, call centers, industrial spaces or finance where screen space is essential Neat workspace: Lift your monitor off the desktop, freeing up vital space on the worksurface; cable management routes cables under the arm, out of the way; combine with Notebook Tray (50-193-200) to support a laptop or convertible notebook Professional-grade quality: Extensive testing guarantees your displays stay stable and secure; backed with a 10-year warranty and expert tech support, Ergotron’s products are built to last