USB Hippopotamus MP3 Player is not only a portable speaker, but also a radio / MP3 player. Built-in a SD card Slot which can read SD(HC) / MMC memory card for playing MP3/WMA audio files directly. It also allows to connect to all iPods, MP3, MP4, MD, CD player, notebook, PC, PDA, PSP, mobile phone and other digital products with 3.5mm stereo audio connector. Built-in Lithium-ion battery - convenient to use. It's another funny gadget on your desk.