I bought one of these for my wife for Xmas.  She wanted a bluetoothmedia player with radio so she could use it on a tread mill etc without wires.
The MP3 part works fine with BT but we soon discovered that the FM radio doesn't.  Fot some strange reson the designers didn't put in and internal aerial   but use the cured headfones as an aerial when when plugged in cuts off the BT.  She's not impressed..

Nothing in the presales info about this limitation so just be aware that if you buy one that blutooth will not work with the radio..