Uncaged ergonomics cd4 uncaged ergonomics engineered cd4 to be the ultimate ergonomic laptop stand and standing desk converter for those who work directly on a laptop with or without an external mouse. This adjustable height and tilt laptop stand perfectly positions laptops to help optimize your posture when sitting plus it allows you to easily convert any desk to standing. Sit, stand, move and improve your posture with this truly ergonomic desk riser and standing desk converter designed exclusively for laptops. features: lightweight, compact, portable laptop riser sturdy design is stable at any height work comfortably sitting quickly transition to standing