AmazonBasics Notebook Arm Mount Tray Tray accessory creates an ergonomic workstation for your notebook computer Open-sided mounting plate with adjustable-length knobs accommodates almost any size Works with LCD arm, pivot, or desk; use with or without docking station Compatible with all AmazonBasics display arms (Single Monitor Wall Mount Arm, Single Monitor Mounting Arm, Dual Side by Side Monitor Arm); sold separately Measures approximately 9.5 by 9.5 by 3.5 inches Attaches to standard VESA 75mm mounting bracket Backed by an AmazonBasics Limited 1-Year Warranty