Logitech Stereo Headset H390 A versatile USB headset with an adjustable, padded headband that lets you get comfortable with pure digital sound. Comfortable design The adjustable, padded headband and plush ear pads keep you comfortable. Noise-cancelling microphone You won’t have to compete with background noise to be heard. Rotating microphone The microphone rotates out of the way when you’re listening to music or watching a movie. In-line audio controls You can instantly adjust the volume and mute the microphone. Pure digital USB You’ll experience clear, digital sound with the simplicity of a single USB plug-and-play connection. What’s good about USB for headsets? System Requirements PC Windows® 2000, Windows® XP, Windows Vista®, Windows® 7 USB port Mac Mac OS® X (10.2.8 or later) USB port Warranty Information 2-year manufacturer's guarantee Package Contents Logitech® ClearChat™ Comfort USB Quick-Start Guide Part Number PN 981-000406 Technical Specifications Frequency response: Headset: 20 Hz–20 kHz Microphone: 100 Hz–10 kHz Input sensitivity: -62 dBV/µbar, -42 dBV/Pa +/- 3 dB Cable length: 2.4 m (8 feet) Connections: USB compatible (1.1 and 2.0)