We no longer carry Poly Blackwire 8225 - headset (6105929), but we found this replacement for you.
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The Poly Blackwire 8225 Stereo USB-C Headset lets the user enjoy clear audio even in the noisiest of environments. It features a noise-canceling mic with Acoustic Fence technology. This headset is designed for all-day wearing, featuring adjustment markers and 180-degree pivoting speakers.