Nothing to attach or assemble Prevents your notebook from overheating; the more air under the notebook, the greater the heat dissipation Protects furniture from heat damage; protects notebooks from liquids spilled on work surface Ideal for presentations: pivots your notebook 360 degrees so others can see the screen Can be used anywhere: at work, home or school Adjust keyboard to a comfortable height with the stackable risers Works with all notebooks Rubber feet keep notebook from moving on airline trays and other slippery surfaces Weighs 630G Lifetime warranty optional. Weights of Hub is 120G