BBGPS allow Android mobile become a Bluetooth GPS for Nikon Camera which have the serial gps port.In order to connect with the Nikon camera , you need a bluetooth module connected to the shutter cable plug.You may bought on or diy one youself.(BBGPS support 3rd party gps adapter as slave device, you may test it before buy it)For the information of the bluetooth module please check out in the website.28/2/2011 add support for 3rd party Bluetooth GPS adapter such as Unleashed D200+BBGPS support ALL Android device,Even without GPS,it will use mobile network for locatingPlease send us feedback to let to keep on updating the list. ThanksThe Full edition will have no time limitation for working. Thank for you support.Auto Focus and Timer function will be release in full version only.