Jabra EVOLVE 40 UC Mono: A professional headset for PC optimised for use with all leading UC systems. Built for style, comfort, and outstanding audio the Jabra EVOLVE 40 UC Mono is an excellent PC headset that can also be connected to your smartphone or tablet. Boasting a specially designed leatherette ear cushion around the speaker to reduce high-frequency sounds and a sophisticated noise-cancelling microphonethe Evolve 40 ensures that you can always hear and be heard.. HD Sound & Passive-noise-cancellation. Kitted out with a top-class speaker for exceptionally clear wideband audio and DSP to remove background noise and echoes, conversations will sound more life-like. And with Jabras Passive-noise cancelling and sophisticated microphone the Evolve 40 UC mono is ideal for use in noisy open office environments.. Plug-and-play for all UC systems. The Jabra Evolve 40 UC has been designed for plug-and-play with all leading UC systems making it an ideal headset for any office. And as i