SKYZONAL Ergonomic Adjustable Computer Desk Extender Arm Wrist Rest Support/Mouse Pad Desk Chair System Computer Armrest Wrist Rest Black Compact, intuitive, comfortable Computer Arm Rest Support Reduces tension and fatique in the neck and shoulder muscles Ergonomic designed for office White-collar worker and so Computer Arm Rest is easy to assemble, no need any other tools. SkyzonalTM is a US registered trademark protected by the US Trademark Law.