Places your laptop at a comfortable height to maximize efficiency. Adjusts to four different angles ranging from flat to 30 to help prevent neck & shoulder strain. Provides space for USB hub. Stabilizing front edge prevents laptop from sliding off unit & supports docked laptops up to 25 lbs. Sliding feet allow unit to be moved & accessed as needed without damaging surfaces. Cooling vents help prevent discomfort from laptop heat. For Use With: 17" Laptops.