E-Blue Cobra Type-II HS705 Advanced PC Gaming LED Headset with Microphone, Black OVER-EAR headphones: 50mm 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: 1103dB (at 1000Hz) Frequency Response: 20 - 20000 Hz Retractable pull-out microphone (Sensitivity: 423dB)