No dial on the headset like previous models. Its adjustable, might sound dumb but I didnt pull down on the ear piece hard enough to stretch out at first so thought it didnt adjust (which I didnt realize it did until getting annoyed and the stitching was hurting my big bald head) so, low and behold, theyre adjustable, much more comfortable now and I wear a 2xl motorcycle Bell helmet (aka big round melon). I own a kuat Bike rack that comes with the bike clamp. so in all I would not recommend this for a PC. The bottom shelf holds boxy items and my Echo Show. I can update my review once I carry my skis which is the primary reason I bought a roof rack. I bought them and installed along with a kayak rack. I have no problem wearing them all day and have no break-in period. If you need TRS cables, definitely buy some because it doesnt come with it. I loved how it could be lifted up to save room when not in use.