The PW-DC-N10 cable connects the 10-pin accessory terminal of any Nikon SLR or DSLR camera to the USB port of a PocketWizard MiniTT1 or Plus III to power the radio using the camera's battery. There is no need, then, to change batteries in the radio or even have them installed. This represents a great and welcome savings in battery purchase and having to be attentive to low battery indications. When not in use, simply detach the cable and store it with the radio or simply leave the radio on the camera hot shoe and plugged in. The radio will automatically turn on and off with your camera.