Built to serve as a wireless bluetooth speaker with theater-like surround sound, the Genius Mobile Theater MT-20 makes a great wireless speaker that offers portability and surround sound on the go. The MT-20 comes with a sturdy built-in handle, a 3.5 mm AUX port, and a micro-SD card slot for playing music straight off a card. It also has a built-in seven watt subwoofer to enhance sound quality wit