Use this versatile keyboard tray while you are sitting or standing. Height can be adjusted for taller users (up to 6-1/4" above desktop) & the range of motion below desk is 5" for custom knee clearance. A simple, one-handed motion instantly repositions keyboard height without locks or levers. The 10" round mousing platform mounts over your keypad or flush with keyboard for easier mousing. As part of the Professional Series, the keyboard tray features a leatherette keyboard palm support with Microban antimicrobial protection that keeps the tray cleaner.