The Promote GPS from Promote Systems is for select Nikon and FUJIFILM DSLR cameras. This device mounts to your camera's hot shoe and lets you benefit from GPS technology to pinpoint the precise location from which a photograph is taken. This technology called "geotagging" embeds geographic information into a photograph along with the time and date stamp.
The Promote GPS Receiver features the SiRF Star III chip, which allows acquiring and maintaining a GPS signal lock. The GPS is powered from the camera and it will automatically power up and down along with camera exposure meter, allowing for further saving of the camera battery power.