Buy from Amazon.com : http://fave.co/1BeEM1r
Lanparte Battery Back Pack Plate Adapter Power Supply Pinch With Internal HDMI Splitter for
Product Description :
Mount Type Sony V-shoe Mount
Can power an onboard camera light or broadcast accessory
Material ABS Flame-retardant plastic and Aluminum
Smart charging functionBuilt-in HDMI splitter
It is a device which can connect the battery and videoing devices together