Pyle PMEM14 Ear-Hanging Wired Boom Microphone for Standard 3.5mm Systems Wired Boom - Connector: Standard 3.5mm plug and 1/4" Adapter Included Lightweight and Comfortable Design Does Not Interfere with Your Performance Element: Back Electret Condenser - Polar Pattern: Omni-Directional Frequency Response: 20Hz - 20kHz - S/N Ratio: &gt;70dB - Sensitivity: -42dB +/- 3dB Output Impedance: 2K +/- 30% - Max. Input SPL: 130dB - Power Supply: DC 1.5 - 9V