This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics Blackwire 202580-01, Over-the-head, Driver 1.26", Maximum Frequency Response 20 kHz, White, Wired, Supra-aural, Sound Stereo, Host Interface USB Type A, Impedance 32 Ohm, Sound Pressure Level 127dB.
The Poly/Plantronics Blackwire C725 USB Headset is great for keeping you focused in noisy office environments and provides the best, enhanced audio quality with LED indicators with wired technology.