A4TECH HU-35 USB headphones 80036400 A4TSLU46718 Product Description: A4Tech ComfortFit HU-35 - headset Product Type: Headset - wired - USB-A Compatibility: Mac, Windows Recommended Use: Computer Headphones Form Factor: Full size Connectivity Technology: Wired Sound Output Mode: Stereo Audio Specifications: Frequency Response 20 - 20000 Hz - Sensitivity 102 dB Impedance: 32 Ohm Max Input Power: 50 mW Microphone: Boom Microphone Operation Mode: Uni-directional Controls: Volume