The instructions are lacking any assistance at all. Not to mention theyre a fraction of the price of pretty much all of the top end true wireless on the market. Id heard they (the HD-449s) needed a good period of running in, so connected them up to my amp and ran them continuously from a CD on repeat (with the phones muffled by a jumper to minimise leakage). Lessoned learned. You must pay attention to the act of balancing and maintaining speed and precise direction in order to stay upright on this trainer. I decided to buy it because it was on sale and I desperately needed one to play Forza and enjoy the game to the fullest. Perfect balance of colors for me. The problem is the instructions, even if you get the right ones for the product (I did) they do not tell you what you need to know! I bought this model as an upgrade and discovered the battery charge only last half as long. This stays in my ears, very very secure and surprising comfortable to wear outofbox!