HeroFiber Experience room-filling 50 W audio with built-in S-Master R digital amps for clear audio highs, while 2-way bass reflex speakers deliver full-bodied thumping bass. The front USB input can be used to connect, control, and charge a wide range of audio devices like smartphones and tablets thanks to the 2.1 amp charging capabilities. You can play MP3/WMA/AAC audio files stored on USB devices. Enjoy MP3 tracks in Hi-Fi sound Give your CDs a new lease on life - Built-in CD player supports CD, CD-R, and CD-RW discs, with shuffle, repeat, and program function for listening control.