Visit Amazon sites : http://www.amazon.com/gp/product/B009YFSKDG?tag=gallianostore-20<br /><br />Syba NC-1 Cobra 2.1 Dual Driver Headphones with Built-In Amplifier and In-line Microphone -<br /><br />Oblanc <br />Deeper Bass with In-line Microphone <br />silver <br />Internal headphone ampifitler helps power the dual driver 30mm and 40mm driver within the headset <br />Controls for both Volume and Bass level <br />Driver Impedance 30mm 32 Ohms and 40mm 32 Ohms
