Audio3 SoundYou Voyager Portable Bluetooth Speaker with High Performance Built-In Class D Amplifier for PC, Mac, iPod, iPhone, MP3, and More (Black) Supports Wireless Bluetooth v2.1+EDR All in one 2.1 Speakers using Acoustic Wave Ripple Technology Supports Analog Audio Line-In & PC USB port Powered by USB or 3 AA Battery High Performance builtin Class D Amplifier