The Ultimate Swivel Bedside Adjustable Hight Table Laptop Desk Perfect for TV remote, food and beverages, books, lamps and phones Metal frame easily smilers under mattress to stay in place. Swivel bed tray can be used on bunk beds, water beds, RC beds and in dorm rooms Handy ledge on both sides keeps tablets, e-readers and books in place even in the angled position Tabletop is 17" X 12" perfectly sized for laptops, letter writing and more