The RF-TX1-EM ear-worn microphone is compatible with the RF-TX1-915 Portable Transmitter. It fits around the back of the ear with the microphone placed close to the mouth. It's specifically designed for versatility and portability without distracting your audience. The microphone has a 3.93ft cable, mini-XLR connector and comes with a garmet clip. It enables hands free communication using a high quality condenser microphone capsule.