The PYLE PMEMS10 In Ear Mini XLR Omni Directional Microphone has a back electret condenser for crystal clear recording of your voice. It uses a 4 pin mini XLR connector, so it'll work great with your Shure system. The lightweight PMEMS10 also features a wired boom, Max input SPL of 130dB, output impedance of 1K ohms, sensitivity of 44dB, frequency response of 20Hz to 20kHz and includes a windscreen. Buy with confidence! This microphone also comes with a 1 year manufacturer warranty. 1 Buy = 4 In Ear Microphones!