Gas assisted adjustment which provides a smooth, quiet and infinite height adjustment 360 degree rotation 88 degree upward and 15 degree downward ergonomic tilt Large capacity cable management Vesa Bracket Included, supports screens from 17" to 30" Supports Dual USB 3.0 located in the base of each unit Up to 21" max extension from base to mounting bracket Designed by Office Star Products, the Office Star Products Single Monitor Arm with Dual USB 3.0 Port in White Finish is built for lasting quality and everyday use. Shop at OJCommerce and explore our collection with free shipping on every order.