Tarkan HQ Glowing Karaoke Noise Cancelling Microphone with in-Ear Stereo Bass Headphone, 3.5mm Jack [Gold] Colour:Champagne Gold   Product Specifications:  Microphone size: 6.5*5.0mm Sensitivity: -31dB(+-)3dB Orientation: Omnidirectional Impedance: < 2.2K Ohms  Operating Voltage: 1.5V-2V Efficiency Response: 20-1600Hz Signal to Noise Ratio: >60dB Plug Diameter: 3.5mm Jack