The additional PATHFINDER 2 TRX GPS Collar is built for expanding your PATHFINDER 2 GPS Dog Tracking and Training System. Featuring a 9-mile tracking range, LED Locate Light, and fully waterproof construction, this is a rugged GPS collar made for serious tracking. The TRX collar is tracking-only — it does not include e-collar stimulation or contact points — and is approved for use in AKC, UKC, and PKC events. You can pair up to 21 collars with your PATHFINDER 2 system. Note: Requires PATHFINDER 2 GPS Connector (sold separately) to operate. Features: 12" Neck Size 9-Mile Range 2.5 Hour Battery Audible Tone Fully Waterproof Receiver Expandable to 21 Dogs and Hunters Geo-fence Option Offline Maps Precise and Up-to-date Maps Tracking Only Mode For Dogs as Small as 35 lbs. Approved for AKC, UKC, PKC events FAQ: Q: Is this a training collar with stimulation?A: No. The PATHFINDER 2 TRX is a tracking-only collar. It does not include e-collar functions or contact points. Q: What do I need to use this collar?A: The PATHFINDER 2 GPS Connector is required to operate this collar and is sold separately. Q: How many collars can I pair with my PATHFINDER 2 system?A: You can pair up to 21 collars to your PATHFINDER 2 system. Q: Is this collar waterproof?A: Yes. The PATHFINDER 2 TRX collar is fully waterproof and built to handle the toughest field conditions. Q: Is this collar approved for hunting events?A: Yes. The PATHFINDER 2 TRX is approved for use in AKC, UKC, and PKC events.