Jabra Evolve 40 Stereo UC - Professional Unified Communicaton Headset Stay in the zone and avoid interruptions, integrated busylight notifies colleagues to avoid interruptions Find inspiration between calls, enjoy your music with amazing sound throughout the day Flexible connectivity, connect using USB or jack All-day comfort and leather-feel ear cushions, and on-the-ear design for all-day use Works with all leading UC platforms, and certified for Skype for Business, Cisco, and more. The evolve 40 has passive noise-cancellation. Simply wear the headset to eliminate high-frequency noise, such as human voices