Zoom microphone with intelligent hot shoe. Power is supplied by the camera's battery. A must-have. Sony ECM-GZ1M Zoom Microphone (successor to the ECM-HGZ1) for camcorders with Active Interface (intelligent special Sony accessory shoe). This compact gun zoom microphone allows you to synchronize the audio track recorded with the Handycam's internal microphone with the zoom orientation. It offers three settings for various recording scenarios. The microphone is powered by the camcorder, so it does not require its own battery.