Califone 3066-USB Deluxe Multimedia Stereo Headset with USB Plug, Flexible Omni Directional Microphone, Around Ear Ambient Noise Reducing Earcups, In-line Volume Control, Pack of 6 Key Features - Pack of 6 3066-USB Deluxe Multimedia Stereo Headset - Recessed wiring resists prying fingers, with rugged ABS plastic headstrap and earcups to hold up to sustained use - Fully adjustable to fit all sizes - Permanently attached cord with reinforced connection resists accidental pull out - 7-ft cord with in-line volume and mute control, mic on/off switch - USB plug with Plug and Play - Flexible gooseneck with electret mic and built-in wind screen to reduce recording of unintended sounds - Noise-reducing earcups lower ambient noise - Replaceable leatherette ear cushions - Slotted baffle prevents access and avoids accidental speaker puncture Specifications - Headphone - Speaker: 40mm Mylar - Magnet: Ferrite Cobalt - Frequency Response: 20-20000 Hz - Sensitivity: 110dB SPL ± 3dB at 1kHz - Input: Min. input 20 milliwatts, max. 30 milliwatts - R/L Output Diff: 3 dB - Distortion: 5% - Input Connection: Backwards compatible USB 2.0 plug - Earcup / Earpad: Noise reducing ABS plastic, leatherette - Cord: 7-ft straight with inline volume control - Microphone - Type: Electret condensor - Directivity: Omni-directional - Sensitivity: -41dB, standard -38dB, max -35dB - Frequency Response: 20-16000 Hz - Impedance: 1500 Ohms ± 15% - Operating Voltage: Nominal +3V; accepts 1.5V-10V - Output Connection: Backwards compatible USB activated host interface 1.0 / 1.1 / 2.0 - General - Weight: 0.75 lbs (12 ounces) each - Shipping weight: 2 lbs each