Razer had me update the firmware, which helped for a couple months then died. Just the ones on the headphones and one extra pair just like em. Rubberized on top for grip. We used a stud finder to drill directly into our 2x4s. Oh yeah, if you want to return this, youre gonna need to disassemble it and put it all back in the box you destroyed just trying to get the parts out. They are comfortable, lightweight and the sound is excellent! The picture makes it look twice as tall. However this isn?t the case when they get a good charge, so also be prepared for this. Like other reviewers, I bought a pair of these slippers and initially they were perfect - warm and comfortable. To be honest, I do not use it at all.