This versatile arm mount combines a mount that clamps anywhere, plenty of adjustable pivot points, 2 USB hubs, and a keyboard tray with anti-slip grips. A perfect addition to a classroom, conference room, or doctor's office, this remarkable aluminum arm installs easily to a desk, countertop, or table, using either the adjustable scratch-protected C-clamp or the included grommet mounting system. Customize your setup with 360-degree rotating pivot points at both the arm base and at the flexible, gas spring elbow joint. At the base of the mount are 2 USB extension ports for easy charging while in use. Just plug the attached USB cables into a computer or other power source, then plug devices directly into the base of the stand. The keyboard tray screws easily into the arm, and holds keyboards in place via rubber padding and a tray lip.