MODEL- AC-851B VENDOR- CYBER ACOUSTICS FEATURES- Internet Communication USB Headset- OEM Pack Stereo Headset and boom microphone with DNCT4 (Direct Noise Canceling Microphone Technology). * USB connectivity* Stereo headset with adjustable headband and boom arm* 7 foot shielded cord with USB 2.0 connector* 180 degree microphone * Leatherette ear pads * Ambidextrous design (wear on right or left side) -- SPECIFICATIONs ----------------------------------DRIVERS - 27mm dynamic driversMICROPHONE - Output : -67dBV/microbar -47dBV/pascal +/- 4dB Power voltage: 1.5v to 10vIMPEDANCE - Headphone : 32 ohms Microphone : 2.2K ohmsFREQUENCY RESPONSE- Headset : 20