Dogtra Pathfinder 2 GPS Connector.Dogtra Pathfinder 2 GPS Connector turns your smartphone into a GPS tracking handheld. Connects to your Pathfinder 2 collars via the free app. No dedicated handheld needed, just use your phone. Uses your smartphone as the tracking device Free Pathfinder app Connects to Pathfinder 2 collars Track up to 21 dogs Compact and portable If you already have a smartphone you trust in the field, the GPS Connector saves you money over buying the full handheld