Additional Details ------------------------------ Product description: Koss CS100 USB Communication Headset - For Gaming The Koss CS100 USB communication headset contains both a microphone and earphones, so you can speak with a coworker or client online. Designed for comfort, the adjustable headset can also be used for gaming and PC voice applications, as well as speech recognition programs. Frequency response: 30 Hz - 16 kHz (headset), 100 Hz - 16 kHz (microphone). Impedance: 32 ohm. Sensitivity: 91 dB SPL. Cord length: 8'. Communication headset. Headset with electret, noise reduction microphone for hands-free communication from your PC. Input frequency: 60 Hz, +/- 3 Hz, Output frequency (sync to mains): 60 Hz, +/- 3 Hz. Topology: Standby, Waveform type: Stepped approximation to a sine wave. Includes four NEMA 5-15R ports, four NEMA 5-15R battery backup ports and input NEMA 5-15P port. Transfer time: 8 ms typical, 12 ms maximum. Cord length: 5', Number of power cords: 1, Color: Black. Interface ports: USB, Control panel: LED status display with on line: On battery: Replace battery and building wiring fault. Alarm when on battery, distinctive low battery alarm. Data line protection: RJ45 10/100 Base-T Ethernet protection, Filtering: Full time multi-pole noise filtering : 5 percent IEEE surge let-through. Dimensions: 3.46"H x 11.89"W x 7.09"D, Weight: 13.64 lbs., Form factor: Desktop. Temperature: 0 - 40 deg C, - 15 - 45 deg C, Relative humidity: 0 - 95 percent, Elevation: 0 - 10000', 0 - 50000', Audible noise: 45 dBA. Contains USB cable and user manual. Meets California (CEC) Battery Charger, CSA C22.2 No. 107.1, ENERGY STAR (USA), FCC Part 15 Class B and RoHS standards and certifications. Comes with 3 years warranty.Comfortable to Wear With its foam ear cushions, the Koss CS100 USB communications headset will provide you with the comfort you want when wearing the headphones for hours at a time.