Product features: ?nidirectional embeded retractable cable ?hoose the desirable length available ?irtual 7.1 channel digital sound driver ?able tangle-free ?ead set type ?SB plug & play ?oft cable and retract safety ?earl pink,pearl white,pearl green and pearl blue can be use ?otton ear muffs make to listen comfortable ?olume control button available ?n/off button available ?mni-directional(270°) micophone Product Spec: Cable length:120cm±3% Headphone Spec: Response range: 20-20000Hz Sensitivity: 113±3dB Impedance: 64Ω±15% Microphone Spec: Sensitivity: -38±3dB @1KHz OdB=1V/Pa Impedance: 2.2KΩ

Retractable USB Headphone product offered by I-more Design and Marketing Limited Company