I had difficulty getting these to work own my TV. Nur noch abschließen und schon können die Fahrräder aufgeladen werden. So after getting into a good routine and with a group of guys who have been at this for a while it was recommended I get a belt for safety as well as assisting with keeping the core tight with certain exercises. When i was done, I realized i assembled the top tier upside down. es un excelente producto, son muy cómodas, livianas y no se resbalan. Put your hands flat against you ears, it goes up till the back of your hand. I even wore it while floating in the ocean. For anyone that has lost a lot of knee cartilage just know the last sole is hard and inflexible. I was able to walk and bend without any issues. Broke in one day.