Encourages separate keyboard use to ensure correct ergonomic posture. Supports up to a 17-inch laptop. Offers three height adjustments. Includes accessory tray. Vents help keep notebook cool. Includes built-in four-port USB 2.0 hub. Triangular design fits neatly into desk corner. Stand Type: Laptop Riser Width: 13 1/8 in Depth: 10 5/8 in Maximum Height: 7 1/2 in.Unit of Measure : Each