40mm Speaker, Mic, 1.8m Cable

Binaural CC&O HS, ED, Microphone frequency response 150 – 6.800 Hz (Wideband), Speaker frequency response, 50 – 18.000 Hz, Compatibility Deskphone

Stereo UC HS for Lync, Microphone frequency response, 150 – 6.800 Hz (Wideband), Speaker frequency response, 50 – 18.000 Hz, Compatibility PCSoftphone

Monaural UC HS for Lync,, Microphone Type, Noise-cancelling, Frequency Response 150 - 6800 Hz (wideband), Speaker Type Neodymium magnet

Monaural CC&O HS, ED, Product Type Headset, Connectivity Technology Mono, Impedance 200 Ohm, Minimum Frequency Response 50 Hz

Headset, monaural, USB, Wearing Style Headband, Transducer principle Dynamic open, Compatibility PCSoftphone

Headset, binaural, USB for MS, Wearing Style Headband, Microphone frequency range 150 Hz – 6.800 Hz (Wideband), Speaker frequency response 60 Hz – 16 kHz

Headset, monaural, USB for MS, Wearing Style Headband, Transducer principle Dynamic open, Compatibility PCSoftphone

Monaural UC headset, 3.5mm jack and USB call control, for Skype for Business