Professional XLR Connector for Camcorders, Audio Recorders, Mixers and More The BY-M4C is a professional XLR connector lavalier microphone, it can be used in any XLR mic inputs or cables. It provides clean and rich broadcast-quality audio. Excellent Sound Pickup Feature & Easy to Get Stated The pickup pattern of the BY-M4C is cardioid, which allows users to pick up the directional sound and filter the unwanted sound resource when clipped to your collar or clothing. BY-M4C is real plug-and-play microphone, it does not require batteries or the any adjustment of settings, just plug it on the camcorders or other compatible devices, then you can get started.