Overview the sennheiser cc 515 ip is an extremely robust monaural headset with extra large ear cap for enhanced fit and comfort ready to maximise work performance this wideband headset delivers a more nuanced soundscape where voice transmission is perceived as warmer and more natural use cc 515 ip for voip communication via softphones on pcs macbooks and ip desk phones features hd voice clarity the cc 515 ip wideband headset delivers natural high definition sound for superior voice cla