The Jabra Evolve 40 UC Mono is a professional headset designed to improve concentration and conversations. Premium noise-canceling technology gives you peace to work in the noisy, open office effectively creating a concentration zone around you, so you can stay focused on the job. The speakers are built for style and comfort with leatherette ear cushions, and are specifically designed to reduce office noise. If you only need the Jabra EVOLVE 40 Mono including the 3.5 mm jack stick, it can be ordered separately. The stand alone headset can be matched with your existing EVOLVE Link, which defines if the headset fits UC or Microsoft Lync solutions.