The Adapter plate is designed for GY-HM600 series to attach wireless audio receivers to the camera. The GY-HM600 series has a dedicated spacing for such adapters.
Space and mounting area:
Dedicated audio input connector 3.5 jack for receivers on the GY-HM600 series camcorder. The AVM-CB6 can use clip mounting, camera shoe mounting, or individual mounting thanks to dedicated space on the plate itself. Additionally it can work as a holding adapter for large GSM or WIFI adapters too.