Fingertip controls puts your monitor at the perfect height and angle to reduce eye, neck and back strains. Monitor arm includes 2 USB ports. Highly adjustable arm moves smoothly up or down, in or out, tilt, or rotate with ease. Strong durable construction withstand the rigors of the busy office. Easy to install clamp or grommet mounting fits desk up to 4 thick and grommets up to 2 3/4 in diameter. VESA MIS-D compliant for 75x75/100x100 monitors. Saves valuable desk space. Use with Alera Sit-Stand Lifting Workstations. Triple Monitors. Wall/Ceiling Mounts and Hardware Type: Desk Mount; Mounting: Clamp/Grommet; Desk; Depth: 7.5 ; Width: 19.5 to 64.5 .