I recently purchased this JBL bluetooth headphone and I am very satisfied with it.Using these headphone for about a month. Its audio is very good and loud.The headphone has built in dollby sound support.thats why its sound is very sharp and crips.It also support built in Fm radio. and you can also insert a micro SDcard directly if you directly want to listen song without any phone.since these are bluetooth headphone you can connect any smartphone to listen songs.it can also receive calls.