Shure MXCW640 Wireless Conference UnitThe MXCW640 Wireless Conference Unit combines a microphone, loudspeaker, and user controls in an integrated wireless unit that complements any meeting space. Wireless convenience eliminates the need to drill holes or route cables, and makes setup for temporary meetings or in rooms with flexible seating quick and easy. A smart rechargeable Li Ion battery (included) lasts over 11 hours, and a choice of gooseneck microphones provides excellent sound