The Jabra Evolve 30 II Mono, is a professional headset with flexible connectivity and great sound for calls and music, Connect using USB or 3.5 mm jack, Call control unit for managing calls, Plug-and-play connectivity | Stay connected, using either USB or jack - Connect to your PC via USB or use the 3.5 mm jack for connectivity to your personal device - such as a smartphone or tablet - to work or listen to music wherever you may be | Easy call management - In-line call controller with large buttons and LED indicators, making handling of calls and music easy. Pick up or end calls, control volume, or simply mute the line | Noise-cancelling microphone - State-of-the-art, noise-cancelling microphone eliminates background noise. Your conversation partner won't struggle to hear what you're saying | Plug and Play setup - Works out of the box with all leading systems. Installation is as easy as simply plugging it in | The Evolve 30 II has Passive Noise-Cancellation. Simply wear the headset to eliminate high-frequency noise, such as human voices - all thanks to the specially designed ear cushions | Compatible with your platform, All Jabra USB headsets and speakerphones work with all the most popular online voice call services | Jabra products work out of the box and allow you to combine perfect sound quality with great comfort