PylePro Model : PMEMS10In-Ear Mini XLR MicrophoneIn Ear Mini XLR Omni-Directional Microphone (For Shure System) Wired Boom Element: Back Electret CondenserPolar Pattern: Omni-directionalFrequency Response: 20Hz- 20KHzSensitivity: -44dB± 3dBOutput Impedance: 2k Ohms± 30%Max.Input SPL: 130dBPower Supp...

This microphone is a condenser type of microphone and requires external power that is referred to as Phantom Power or may also be listed as +48V. This is very common and is usually found on most DJ or multi channel (band) mixers