The Jabra Voice 550 is the ideal headset choice for modern UC (Unified Communications) systems. The Mono features a single speaker with wideband response for the clearest voice quality, together with a noise-cancelling boom microphone. Its compatible with all leading UC applications and softphones, with Cisco and Avaya certification for trouble-free installation in your office environment. The comfortable design features a padded headband and leatherette speaker cushions. With an in-line call controller, you can easily answer calls, hang up and adjust volume.