Work "sitting" or "standing". Height can be adjusted for taller users (up to 6 1/4" above desktop) and the range of motion below desk is 5" for custom knee clearance. A simple one-handed motion instantly repositions keyboards height without locks or levers. The 10" round mousing platform mounts over your keypad or flush with keyboard. Leatherette keyboard palm support with Microban? antimicrobial product protection keeps product cleaner. Color: Black; Workstation Type: Curved; Diagonal; Straight; Height (+/- Desktop): +6 1/4"/-5"; Keyboard Tray Dimensions (W x D): 19" x 10 5/8".