Stereo Surround Sound 50mm with Neodymium Magnet Speaker Unit Dual Support Metal Headband Large Ergonomic Soft Leather Ear Pads 7-Color Cycle Breathing LED Backlight Noise Cancelling Omni-Directional Mic. Adjustable Volume Control Knob Microphone: Frequency Response: 100 Hz - 10 KHz Sensitivity: - 44 dB Color: Black,