Features: The battery plate is compatible with Sony NP-F550/F570, NP-F750/F770, NP-F950/F970 battery. Supports DC 8V DC 12V output voltages and with dual USB interfaces, can be used as power supply adapter of different devices; and with a type-C input for convenient battery charge. You can install the battery plate to camera cage or other bracket via 1/4 inch screw or the included cold shoe adapter for more convenient usage. Comes with a FW50 dummy battery coupler, which is compatible with Sony A7/A7R/A7S/A7II/A7RII/A7SII/A6300/A6400/A6500, etc. With this battery plate + dummy battery kit, you can connect external battery power source to your camera to achieve long time shooting.