Dogtra Dogtra Pathfinder Mini E-Collar Black PATHFINDER MINI. The Pathfinder truly works without using cellular data. Specifications for Dogtra Dogtra Pathfinder Mini E-Collar: Manufacturer: Dogtra Color: Black Features of Dogtra Pathfinder Mini E-Collar: 4 Mile range 2 Hour rapid charge battery 2 Second GPS Update Rate Geo-Fence option Expandable to 21 dogs Package Contents: Dogtra Pathfinder Mini E-Collar Dogtra PATHFINDER MINI: Dogtra Pathfinder Mini E-Collar Black