After about 10 seconds, the red light should go out which means the transmitter has finished pairing with headphone No. wav files (my own collection rip)To those who praising it havent come out of the shell. The headphones are very good and the sound is amazing thank you. They are very comfy and stylish. Left and Right markings are difficult to see. These feel very bouncy, like pillows, but the height of the sole is perfect. It is plastic rather than metal so doesnt feel as solid as the better mechanical keyboards but the build quality is still very good. your true shoe size; you dont have to worry about these being lose because youre not wearing socks; I wear 46(EU) or 12(US) and XL for these. But as for whole numbers, stay same size as shoe or running shoe. Unfortunately you cannot move the mic to the other side.