Verbatim Deluxe Headset with Microphone Pack Size: 1 Minimum Bulk Purchase: 10 x 1 packs (10 total) Features: Flexible strap for comfort Volume control and on/off switch for microphone 2 metre shielded wire Designed for multimedia applications High quality stereo sound Microphone cover to eliminate distortion Adjustable microphone angle for comfortable use Powered by soundcard Product Specifications: Headphones Frequency Range: 20-20,000 Hz Impedance: 32 Ohm Max. Power Input: 100mW Sensitivity: 97dB Jack: 3.5mm Cord Length: 2m Microphone Impedance: Low Sensitivity: -62dB Jack: 3.5mm