owered by 36 watts of PMPO Stereo Sound, clear and front-firing audio coloration and Bass Boost (fully-enhanced bass), the Philips Black Multimedia Base (for the 107E 107T and 107B monitor series) powers up your system's audiovisual options without taking up valuable desktop space. With speakers measuring 2" in diameter, this standalone unit conveniently attaches itself to your monitor's standard base, enhanced with microphone input/output functionality for your personal listening and recording pleasure. Additional features include bass boost, USB hub compatibility one upstream port, and four downstream ports.