【ORIGIN】Single Monitor Arm: Includes mounting base、pole and arm, which supports mounting one monitor.
【EVOLUTION】Monitor Arm Set: Only includes arm set WITHOUT mounting base and pole, which allows enhancing 【ORIGIN】to Daul Monitor Arm.
【SUSPENSION】Laptop Tray: Attaching it to the VESA plate allows placing laptop, tablet, or portable monitor.

Please feel free to contact us if you might have any questions or concerns.