POLY Blackwire 3220 Stereo USB-C Headset +USB-C/A Adapter (Bulk)

Certification: UC | Cable colour: Red | Noise reduction: Yes | Volume control: Button | Signal-to-Noise Ratio (SNR): 118 dB | Product type: Headset | Operating keys: Volume + | Wearing style: Head-band | Depth: 32 mm | Height: 178 mm | Mac operating systems supported: Yes | Package width: 178 mm | USB connectivity: Yes | Microphone frequency: 100 - 10000 Hz | Microphone sensitivity: -38 dB | Operating keys: Answer/end call | Operating keys: Volume - | Headphone frequency: 20 - 20000 Hz | Width: 155 mm | Headset type: Binaural | USB connector: USB Type-A | Headphone sensitivity: 90 dB | Package depth: 254 mm | Ear coupling: Supraaural | Microphone direction type: Omnidirectional | Recommended usage: Office/Call center | Control unit type: In-line control unit | Driver unit: 2.8 cm | Package height: 10 mm | Control type: Buttons | Microphone type: Boom | Audio adapters included: USB | Operating keys: Reject call | Impedance: 32 Ω | Windows operating systems supported: Windows 10 | Operating keys: Mute | Connectivity technology: Wired | Package weight: 152 g | Product colour: Black | Country of origin: Mexico | Country of origin: China | Quick start guide: Yes | Ear pad material: Polyurethane (PU) | Hearing protection technologies: SoundGuard DIGITAL