... tone performance perfect.Mini audio box with new conceptintegral stereo portable mobile music,connecting your mp3, mp4,mobile phone,notebook ... solution,for your option.several power supply manners including battery,computer USB,adapotor DC-5V allow you to enjoy the charm of digital ... 45mm),magnetless,4ΩPower supply: DC 5V(Inner+ outer-),USB power rotate connect line(can choice)Line in: configure 3 ...