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. Leather-feel ear cushions and on-the-ear design for all-day use The Evolve 40 is a headset featuring amazing sound for calls and music and an integrated busylight to enhance your productivity by notifying colleagues that you are busy – therefore allowing you to avoid interruptions in the open office. Connect the headset using USB or jack. Leather ear cushions allow for all-day comfort.