VXi 203501 CC Pro 4010G Over-the-Head Monaural Headset with N/C Microphone Advanced noise canceling improves communication by cutting nearly 90 percent of background noise. Wideband audio (HD Voice) provides clearer conversations and greater productivity. Hearing protection suppresses sudden and unexpected sound spikes. High quality durability stands up to all-day, every-day use. Requires G-type QD lower cord (available separately) to connect to your phone.