The Unleashed N1/N2 plugs directly into a 10-pin port on Nikon DSLRs. Through this port we get power and information on the camera state. Remote triggering, intervalometer as well as geotagging are possible on all Nikons through this port alone. On newer DSLRs (since about 2012), we can even control almost all settings through this port, so changing settings, manual and automatic exposure ramping are possible without a USB cable entirely. On older Nikons you’ll need to connect the USB cable for changing settings.
On all Nikons, the USB cable enables getting thumbnails, and also activates some extra settings, most notably metering mode (spot/matrix/center-weighted). It also makes automatic switching to video mode a little easier. Additionally, there are more image histogram based algorithms available for Autoramping. Even with the optional cable connected, the Unleashed N1/N2 is still smaller than the Canon C1/C2 versions, and we made the cable just long enough, really flexible and with right-angled plugs that are as small as possible.