SmallHD FOCUS monitors have a power output for small cameras, and with this FOCUS to Nikon EN-EL14 power adapter, you can power your Nikon DSLR directly from the monitor. Insert the dummy battery end into your camera and connect it to the FOCUS monitor's output for power. Powering the camera via the monitor's battery will allow for a simplified power setup and longer shooting times between charges, compared to standard internal batteries.