The response was quick and professionally got handled. - The bolts to the knobs could be a bit longer (an inch?) -- $1. This is a solid device and everything about it is top-notch. Ma soprattutto la qualità audio, pur non essendo paragonabile ad una cuffia aperta casalinga, è ottima. For the price point it?s a recommend. If feels solid and sturdy plus the color is amazing. I love the look and feel of these shoes! The smallest are a bit too small for my ears while the medium/medium+/large are a bit too big. as I lost my outer cover of earphone. I will maybe re-position them and see if that changes things.