The Nikon GP-N100 GPS Unit is ultra-compact & has been specially designed to work with Nikon's interchangeable lens format cameras that include a multi accessory port. Designed to be portable, it attaches simply to the camera accessory port on the camera & automatically records location information such as latitude, longitude, altitude & time as geotags' in the image data (EXIF). The GP-N100 GPS Unit also features an A-GPS switch for rapid start up.