Portable wireless speaker Applicable to USB,SD/MMC card,computer, ... ,mobile phone,IPOD,PSP,MP3,MP4 to listen to music-Have audio interface,can do computer speakers -Power supply ... all digital fans without a headset, also can enjoy the music sounds gourmet space! Super small portable, speakers, overall appearance ... timeWorking Hours6 watts20-20KH2>85dB1-2 hours4-5hours wireless USB laptop speaker