The GP-1 GPS Unit fits the D800 in addition to a variety of Nikon DSLR cameras. It adds GPS coordinates (“Geotags”) to image EXIF data. Recorded information includes: latitude, longitude, altitude and time information. It is powered by the camera and provides red and green indicator lights to show accuracy level based on number of acquired satellites.
Dimensions: 2 x 1.8 x 1 inches
Weight: 24g (0.85 oz)
Accuracy: 10 m / 33 ft (horizontal)
Power consumption: 180 mW (average)
Suggested Retail Price (Feb, 2012): $265.00
Product Number: 25396
Product Manual: http://www.nikonusa.com/pdf/manuals/dslr/GP-1.pdf