E-Blue Mazer Type-X PC Gaming LED Headset with Microphone, Black ON-EAR headphones: 40mm neodymium speaker units Multifunction volume/mic-control & lights switch Over-the-head suspension headband for ease of wearing Shocking Bass effect enhancement and crystal clear sound 3.5mm (Audio & Mic Inputs) + USB-powered LED illumination Impedance: 32 Ohm / Sensitivity: 100dB (at 1000Hz) Frequency Response: 20 - 20000 Hz Rotatable microphone (Sensitivity: 543dB)