Additional Details ------------------------------ Product description: Shipping Height: 2.2 Shipping Width: 7.2 Master Pack Qty: 24 General Information Manufacturer: Cyber Acoustics, LLC Manufacturer Part Number: AC-840 Brand Name: Cyber Acoustics Product Model: AC-840 Product Name: AC-840 Internet Communication USB Mono Headset Marketing Information: Direct Noise Canceling Microphone Technology Ambidextrous design (wear on right or left side) 180 degree microphone Adjustable headband Adjustable boom arm Product Type: Headset Technical Information Connectivity Technology: Wired Cable Length: 7 ft Impedance: 2.2 Kilo Ohm Impedance: 32 Ohm Minimum Frequency Response: 20 Hz Maximum Frequency Response: 20 kHz Earpiece Earpiece Design: Over-the-head Earpiece Type: Monaural Driver Size: 1.06 Microphone Microphone Technology: Noise Cancelling Microphone Design: Boom Microphone Sensitivity: -47 dB Interfaces/Ports Host Interface: USB Miscellaneous Green Compliant: Yes Green Compliance Certificate/Authority: RoHS