To be honest for the money I paid I didn't expect them to be very good BUT they are very comfortable, fit my ears perfectly and the mids and highs are EXCELLENT. The bass is definitely there but not raspy to be honest the sound is so good I have to fault the bass. The installation was missing. I connected them (see photo) and they work. USB is not required, it only powers the LEDs. The microphone works perfectly, you can hear it without any problems, it can be switched on and off using the switch on the volume control. It's AMAZING for the price. I definitely recommend them.