All the advantages of the H61, plus exclusive noise-cancelling technology which reduces transmission of ambient noise from the workplace. Supports Call Clarity and patented SoundGuard PlusTM technologies for superior sound Noise-cancelling microphone for clear and clean transmission Sound in both ears to help in hearing callers Adjustable headband provides an ultra-stable fit Soft ear cushions for comfort 10' coil cord with Quick DisconnectTM Flexible microphone boom Adjustable clothing clip H61N: Supra NCTM Binaural Headset Supra H61N H61 Binaural Headset Headset Headset Express Loracomm Plantronics H61N: Supra NC Binaural Headset