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Poly Blackwire 3220 Stereo USB A Headset (Bulk) 507024 00044 Includes hardware for wood 507024 00145 Includes hardware for wood stud 4 mm Height 291 8 cm Headphone sensitivity 90 dB Impedance 32 Ω Headphone frequency 20 20000 Hz Ear coupling Supraaural Microphone Microphone direction type Omnidirectional Microphone sensitivity 38 dB Microphone frequency 100 10000 Hz Microphone type Boom System requirements Mac operating systems supported MacOS Windows operating systems supported Windows 10 61 m Control type Buttons Control unit type In line control unit Volume control Button Operating keys Answer end call
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