Going over-under was a HUGE risk to the bicep tendon and after some strains and that uneven feel, I had to call it a day on that and it started this journey to something to help me over that minor hump. I like the feel of the tactile buttons, and the included clip is a welcoming feature. They are so very well made, and so stylish as well. Passen perfekt, sind warm und kuschelig und die "Gummi Noppen" an der Fußsohle geben einen sicheren Halt auf unserem Parkett und den Fliesenböden. Not a value for money product. Definetly recommend this product. Ad said original replacement. Not good enough. The 4 was a stereo unit, this is mono and they no longer stay on when plugged in. It does everything it says and more!