Phottix GPS Geo One GPS (Nikon) Uses multiple (3 and 4) satellite positioning set ups with receiving indicators Satellite acquisition approximately 45 sec cold and 5 sec hot Cables included to fit models: D90-D5000-D3100-D7000-D3-D300-D700-D200 Same functions as the GP-1 Mounts on camera hot shoe and electronics fed by camera