Be careful not to over tighten the mounting brackets. small charging case, can use either one independently. These have been a real treat and palate cleanser. This was an awesome price and seem to be well built overall. Now I have to send them back. I may get a second one and stand them side by side. Overall this is a very good sounding headset, another quality Sennheiser product but it needs to have the mic redesigned so that its easier to customize where it sits on anyones face before being switched off. I just wish there was a wireless model that didnt require dongles. It starts to wear through within a couple of weeks. Fits well and has lasted us so far about 6 months!