It was always hard to find the right collar for the right brush before. The PX7 equips wear sensors which in theory auto pauses and plays the music depending on whether you?re wearing the headphones or not. I even tried pairing with the L but then that only paired with the left. The sound quality is great and I love the color. I have found the movement and operation to date to be smooth and I have had no issues with buttons not responding. Like wearing slippers but sturdier . My hope is that the V2 of this product offers 2 USB-A ports, 2 USB-C ports, better placement of the main I/O port and more reliable mounting of external HD drives. He can get a video going on his desktop and relax on his bed. Overall, I?m happy with the fit and appearance of the navy size S. She said it was the best sounding and realistic audio than any other headphones she has used in the past.