IDX A-DCFX9 is a V-Mount adapter specifically designed for the Sony PXW-FX9. It converts the attached battery to the camera required 19.5V and supplies power via the DC input. By using it in combination with a small battery like the Imicro series, you can build a small and lightweight system that has a sense of unity with the camera. Also equipped with 2x D-Tap and an Alarm LED to alert battery level.