... & suppliers CE,ROTH option Portable Guitar Speaker with FM,Wireless guitar speaker,mini guitar speaker manufacturer & suppliers Type: ActiveUse: Home ... Channels: 2 (2.0)Special Feature: Wireless, Portable, Minimp4 speaker: USB Portdigital volume control: Windows 2000 (SP4)Windows Vista: ... MP4, Notebook and other personal electronic products as source component It can read SDHC, SD, MMC and USB flash ...