The Sound To Go USB Micro Speaker from Edifier is an all-in-one micro speaker that is portable and encased in an elegant brushed aluminum chassis. Use the included USB cable to power and to connect the speaker to your audio source such as your laptop or desktop and control the volume with the simple volume controls that are located on the speaker or on the host device. The extra auxiliary input on the speaker enables the use of multiple host devices. The Sound to Go uses its 3 x 1 1/4 inch oval shaped passive radiator subwoofer, two 1 1/4 inch mid-range drivers and two 1 1/4 inch tweeters with a built in amplifier to provide exceptional audio performance above and beyond any built in speaker solution. The Sound to Go speaker system is ideal for the individual that travels with a laptop and desires quality sound.