I cant possibly say enough good things about this DVD! Both previous masks had buttons for volume control but they didn?t function. Software is average or on par with anyone else?s. The price was still the same though. Ill report back here what I find out. My brother is also a size 9. Bought it once in July 2019 and after several months, the headset band snapped when I went to put it on. But I feel like this product can be improved with the RADIO Features. Well see if the ribbed pipe material maintains good suction. The previous model was so comfortable and all he want is another pair.