Places your laptop at a comfortable height to maximize efficiency. Adjusts to four different angles ranging from flat to 30° to help prevent neck and shoulder strain. Provides space for USB hub. Stabilizing front edge prevents laptop from sliding off unit and supports docked laptops up to 25 lbs. Sliding feet allow unit to be moved and accessed as needed without damaging surfaces. Cooling vents help prevent discomfort from laptop heat. Four Viewing Angles. Stand Type: Laptop Riser; Width: 13 3\/16"; Depth: 11 3\/16"; Maximum Height: 4".