Volume adjuster Full Size Over-Ear Headset Connect with a USB Advance 7.1 Virtual Surround Sound Engine RGB LED Light Programable Support Noise cancellation Microphone Full-Size 7.1 Gaming Headphones Channel : True 7.1 (SSS Chipset) LED: Running RGB Plug type: USB Plug Driver size: 50 mm Cable Length: 2.5m Plastic cable Headset Size : 215*190*110 mm Freq. range: 20-20K Hz Speaker Sensitivity: 95+/-3dB Microphone Sensitivity: 58+/-3dB Impedance: 32+/-15% Directivity : Omni directial Virtual Surround Sound Great Bass Noise Cancelling MIC