All the screws and raw plugs are in the box. There is lots of instrument definition and separation, air. My daughter is autistic and has very sensitive ears some times she needs sound cancelling as well. Now Im considering adding more caddys around the shower that I know will be secure with these suctions. He loves them and brags about them. I wish Id paid more attention to the length of the cord. My boys said they are comfortable. This is the simplest and lightest design, and it comes in a wide range of colors, including a really good looking faux carbon. You have to pick up you bike, and rotate it to the side a little to get it on the hook. Ich muss sagen, die App lässt sich super an.