PROFESSIONAL HEADSET - The Jabra Evolve 40 pro headset is built for greater productivity and amazing sound quality for calls and music.Note : If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ear | BE MORE PRODUCTIVE - Stay in the zone and avoid interruptions thanks to the busylight that automatically turns on during a call to let others know to not disturb you. It can also be manually activated, so it’s a call center headset that keeps you focused | FLEXIBLE CONNECTIVITY - The 3.5mm jack lets you connect this Jabra headset to your personal device, such as a smartphone or tablet, so you can work or listen to music wherever you are. It also has a USB connector for even more flexibility. | ALL-DAY COMFORT - The on-the-ear headset design along with the leather-feel cushions provide all-day comfort. Plus, simply wearing them eliminates high-frequency noises, such as human voices, to help you stay comfortable and connected | COMPATIBILITY - This office headset works with all leading UC platforms. Certified for Skype for Business, Cisco, and more. It is also compatible with all of the most popular online voice call services