La FM ne fonctionne pas. Maravillado con mis bocinas nuevas I purchased the item less than two months ago. I much prefer these over crocs. a timely manner, easy to install, and just as pictured. I turned them on and was delighted to find out they were fully charged. Upgraded controllers would help with movement greatly. Admittedly, I have bigger arms, so the strap is a little tight even when I try loosening it. This is a very nicely designed and built headphone. Love these shoes - they are so comfortable, and stylish too.