La calidad del sonido es muy buena, estamos hablando de Sony una marca reconocida por esto. I am already looking to see what other styles are out there. I have put in about 90 mins so far and I am no where near done and considering power tools wont work to get it secured to the car I have a feeling it will be a return item Im a 9 & went 1 up to 10 & perfect so deff go 1 size up. Battery life on two nickel metal hydride AAs under heavy daily use last for weeks. ;)My biggest issue of the last few systems they are not backwards compatible, and older systems are getting hard to find. I am honestly amazed at the overall look, feel, comfort and value of these shoes! 5mm cable included) OR full digital through the USB-C port. I returned them for a size 9 which fit perfectly. - The headset is adjustable, the cushions are comfortable and provide a decent noise isolation - The construction seems pretty sturdy.