Adjustable Height and Angle Ergonomic Reading Stand Book Holder, Book holder, Tablet Stand, Document Holder. Perfect for Textbooks! Aluminum, Black ADJUSTABLE HEIGHT: Raise reading materials to eye-level and stop slouching | Height Range: 0-21" ADJUSTABLE ANGLE: decrease page & screen glare. Eliminate eye strain. Panel locks in 15-degree increments OPEN SPACE BOTTOM: Helps de-clutter & organize desk space. Perfect place for taking notes! LIGHTWEIGHT: Premium anodized aluminum panel | sturdy, durable, and portable | Collapses Flat | &lt;4.5lbs PERFECT for studying, reading textbooks & cookbooks | Slips over your lap in bed and on the couch to make reading more comfortable