Yunhua Dem-01 in Ear Mini XLR Omni-directional Microphone (For Shure System) Wired Boom - Output Impedance: 1k Ohms 30% - Dimension: 5MM Element: Back Electret Condenser - Max.Input SPL: 130dB - Connector: 4 Pin Mini XLR Polar Pattern: Omni-directional - Power Supply: DC 1.5V-10V - Color: Skin Frequency Response: 20Hz- 20KHz - Cable:1.5 x 1.2M - Accessories: Windscreen Sensitivity: -44dB 3dB - Weight: 13g