... 76 -108MHZ4, Excellent tone quality, with wallyson dual channel stereo.5, Dual power supply, built-in rechargeable lithium battery and USB ... 4Power Voltage: USB / DC 5.0 VAccessory : Audio cable ,USB cable, lanyard , lithium battery ,manual. Warranty Card.Main function ... : 4Power Voltage: USB / DC 5.0 VAccessory : Audio cable ,USB cable, lanyard , lithium battery ,manual. Warranty Card. alto-falante ...