The BT headphones that Ive bought seemed to all be a fail on the frequency response side. Make sure you spray it while outside. I had the same issue with a pair that were a good deal more expensive. Well, a new product always has better technology. I’d also say that my arms and legs don’t hurt at all while using this it’s more of a scratching feeling, it’s the sensitive areas that are “painful”. This is my last pair. Very cute and well made! Overall, definitely recommend for heavy-handed typists that have a need for speed and accuracy. I actually bought one for my air pods because I like these cases so much. 6 oz (248 g).