The JVC KD-R421 CD Player features a front panel mounted USB that reads WMA and MP3 files from a memory stick and an AUX input that recreates sound from any external analogue input. It also has another AUX input on the rear that lets you connect the Bluetooth adaptor for making hands-free calls and streaming music from a mobile phone or any other Bluetooth enabled device. In addition, it is compatible with ID3 Tag/WMA tag.