Su contenido no llega ni siquiera a un MANUAL elemental. But after a 12hour shift my feet weren?t sore! I wish the rapid-fire button was even faster. Il primo impatto con i materiali è stato positivo e lidea della base di ricarica è ottima così lo rende più impermeabile anche se io in piscina o a mare eviterei di indossarlo. Use of hand held screwdriver will sometimes have a better result than use of power tools. They have fantastic sound and everyone can understand me on the microphone without all the background noise. I let them expand for a few hours before putting them up with 3M strips (no backing) and none have fallen off of the walls even with my kids have been playing with them and touching them so Im not sure using a backing is necessary. Oh well, I?ll give the medium and the large sizes to a family member. It does not come with instructions but honesty you dont need them. mic doesnt work.