The Voyager 4200 UC Series meets the needs of office workers and IT. With a choice of stereo or mono, crystal clear audio, wireless freedom and the ability to switch seamlessly between mobile phone and PC, the Voyager 4200 UC Series makes you more productive and improves your voice communications. Now every employee can move freely around the office even during a call. Offer your employees more freedom of movement and at the same time increase productivity with a long range of up to 91 m with the Office models and up to 30 m with the UC models. Experience legendary Poly sound quality when playing media, collaborating with colleagues or perceiving your surroundings. Excellent noise cancelling and two microphones also help you block out nearby conversations.