Jabra EVOLVE 40 UC Stereo Headset for PC, Smartphone & Tablet: With remarkable noise-cancelling & HD sound. Offering top-class sound and noise-cancelling for call centres and busy offices environments the Jabra EVOLVE 40 UC stereo is a professional quality headset for businesses using Unified Communication. Boasting an intuitive “busy light” indicator to let others around you know when you’re on a call and Jabra’s passive noise-cancellation, the EVOLVE 40 has been designed to improve your focus and concentration at work.. Ultimate noise-cancelling for professionals. The Jabra EVOLVE 40 UC has been designed for use in noisy office environments and counteracts interference from high-frequency sounds (such as co-workers talking around you) with Jabra’s intuitive passive-noise cancellation.. High-Definition Audio. Equipped with world-class speakers you can use the Jabra EVOLVE 40 UC stereo for both calls and music, and conveniently integrate the mic boom into the headband when not in use.. Switch seamlessly between PC & Smartphone. With Jabra’s Intelligent Call Transfer you can easily take over calls on your PC with your smartphone. Ideal for mobile workers simply disconnect the Jabra Evolve 40 UC Stereo from the USB call-control unit and plug the 3.5mm jack into your mobile device.. Why should you buy this stereo headset for PC?. The Jabra EVOLVE 40 UC Stereo is the perfect headset for those who work across PC and smartphones delivering excellent sound quality and top-class noise-cancelling.