Engineered to help you concentrate. Professional corded headset to boost your focus in the open office. Activate the red busy light to create your own concentration zone and keep you from being disturbed. Works straight out of the box with all leading UC systems and the the 3.5mm jack lets you connect to a PC, smartphone, tablet, or any other personal device. The special “busy light” turns red to let people know when you’re on the phone. You can also turn it on manually when you don’t want to be disturbed. You can switch on active noise cancellation to virtually eliminate low-frequency sounds, like the hum of air conditioning. Active noise cancellation uses advanced microphones to monitor and counter ambient noise.