The Dogtra Pathfinder2 Additional Receiver expands your existing Pathfinder2 GPS Dog Tracking and Training System to support more dogs with unmatched accuracy and control. Designed for rugged conditions, this waterproof GPS collar features a 9-mile range and supports both Nick and Constant stimulation, vibration, tone, and an LED locate light for added visibility. It is compatible exclusively with the PATHFINDER2 GPS Connector and App, allowing tracking of up to 21 dogs with access to geo-fence features, offline maps, and real-time positioning. Ideal for hunters and trainers, this collar is built for dogs as small as 35 pounds.