Our GPS tracking collars are packed with features and industry leading accuracy that delivers modern technology delivered right to your smartphone. Current models include: PATHFINDER2, PATHFINDER2 TRX, PATHFINDER2 MINI and PATHFINDER2 MINI TRX. These collars allow hunters, professional handlers, and K9/military officers to track as many as 21 dogs with a range of up to 9 miles.