How do you improve on a class-leading product? At Jabra the answer's simple- we listen to the user. Over the last five years we've refined and improved the JABRA BIZ 2400 II DUO Headset to not only keep ahead of a changing industry, but to define it. BETTER CONVERSATION ULTRA NOISE CANCELLATION Ultra noise cancelling microphone to eliminate background noise. BETTER SOUND HD VOICE + HIFI SOUND For crystal clear conversation. BETTER BUILD UNBREAKABLE 360 SPIN BOOM ARM For outstanding durability and optimum positioning. BETTER COMFORT 40% LIGHTER THAN COMPETING HEADSETS Super soft leatherette head and ear cushioning for a superior fit.