The Deluxe Stereo Headset is designed for language learning in today’s classrooms. This compact, adjustable headset is ideal for high speed internet listening, language learning and tutorials in computer labs and other multimedia applications as well as a web phone. 1. Recessed wiring resists prying fingers, with rugged ABS plastic headstrap and earcups to hold up to sustained use 2. Fully adjustable to fit all sizes 3. Permanently attached cord with reinforced connection resists accidental pull out 4. 7’ cord with in-line volume and mute control, mic on/off switch 5. USB plug with Plug and Play performance and Android / Windows / Mac compatbility 6. Flexible gooseneck with electret mic and built-in wind screen to reduce recording of unintended sounds 7. Noise-reducing earcups lower ambient noise so volume does not need to be as high, as recommended by audiologists for hearing safety 8. Replaceable leatherette ear cushions 9. Slotted baffle prevents access and avoids accidental speaker puncture • Two-year warranty for school use - unlike headsets purchased at consumer electronics stores whose warranties would be voided if used in schools Headphone Speaker 40mm Mylar Magnet Ferrite Cobalt Impedance NA Frequency Response 20-20,000 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’ straight with inline volume control Microphone Type Electret condensor Directivity Omni-directional Sensitivity -41dB, standard -38dB, max -35dB Frequency Response 20-16,000 Hz Impedance 1,500 Ohms ± 15% Operating Voltage Nominal +3V; accepts 1.5V-10V Output Connection Backwards compatible USB activated host interface 1.0 / 1.1 / 2.0