Plantronics SupraPlus SDS 2490 Monaural Head-band Black headset

Monaural, 100Hz - 10kHz (Receiver), 150Hz - 10kHz (Mic), 150Ohm, Black The Plantronics SupraPlus Dynamic headsets leverage the proven design of the HW251N to set new standards in comfort, reliability and audio quality. The dynamic noise-canceling microphones enable clear, uninterrupted communications in mission critical applications. The over-the-head design offers a stable fit for extended wear. Circummaural ear-cushions (sold separately) are also available. Cable, connector, and PTT options are available upon request.