Features world class speakers that are built for both voice calls and listening to music. Switch easily between conversations and listening to your favourite tracks. The in line call controller gives you easy access with large buttons and led indicators, and the discreet boom arm can be tucked away into the headband when not on a call. The integrated 'busy light' turns red to let people know when you are on a call. It can also be turned on manually when you don't want to be disturbed. Integrated busy light jabra intelligent call transfer 3.5mm jack for better connectivity optimised for microsoft skype for business passive noise cancellation discreet boom arm