DescriptionCalifone 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 12Key Features- Pack of 12 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 punctureSpecifications-
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