The open-sided, adjustable mounting plate of the Ergotron mount tray can easily hold notebooks of various sizes. It comes with screws for mounting and a non-slip pad and clips to keep your device stable. This easy-to-attach arm mount tray can be used with or without docking stations. The Ergotron notebook tray is designed with a mostly open design underneath to allow effective heat ventilation during device operation. It's adjustable for different-sized laptops, and it swivels up or down, providing an ideal height and angle. This tray is versatile and makes using your computer easier and more effective while taking up a small footprint of space.