AUDSTER AUD-B800K PROFESSIONAL RECHARGEABLE SPEAKER • Built-in Rechargeable Battery • BT Wireless Connection • USB/ TF Plug and Play • FM Radio, Automatic Channels Scan and Store • Wireless Microphone • Audio Line Input • MIC & Guitar Slots • MIC Priority • 8″Woofer and 7″ Tweeter • Adapter Voltage:100V-240V 60/50Hz