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. Certified Skype for Business for simple UC integration for plug-and-play straight out of the box. Professional headset for greater productivity and amazing sound for calls and musicEngineered to boost productivity, the Evolve 40 is a corded headset for professionals who take calls at their desks and need to avoid interruptions. Connects using a USB or jack, includes an integrated busylight and is certified for Skype for Business, Cisco and more. Performance Certification Microsoft Country of origin China Plug and Play Yes Music playback Yes HD voice Yes Hearing protection technologies Jabra PeakStop, Jabra Safetone G616 Number of simultaneously connected devices