They are always tight, and while they can be readjusted, its kind of a pain. It helps to not having to shout louder to make yourself louder during the meeting. My big issue with the mouse is the scroll-wheel. Comodidad: Leí que varios decían que no eran muy cómodos, pero en lo personal a pesar que en un inicio sentí que apretaban un poquito, a los minutos se me olvido, por eso yo difiero de eso, me gustaron para usarlos varias horas. Don’t like it at all and have to throw away since Amazon will not honor a return because of aerosol can. I like the lined ones for cool Wisconsin weather! I live in the US and had no problem (Strait-talk Service). But the plastic on the headset, itself, left me torn. I am sure its an easy fix I just did not have time to do it. The cord just plugs in to the back of my desk phone and I use the headset button to pick up and the goodbye button to hang up so I never touch the handset.