... SNR:75dD Mini Digital Speaker Portable,2.0 USB Powered Speaker We produce kinds of mini speaker, portable speaker, usb speaker, 2 ... 5.Build-in audio line6.Power:Build-in USB cable (5V/1A)7.Plug:Stereo 3. ... ,mp4,moblie phone,laptop,computer,pad,your best mini digital speaker Digital audio decoding chip inside, pure ... Looking forward to working with you. Mini Digital Speaker Portable,2.0 USB Powered Speaker