PetSpy M86 Extra Remote Transmitter - Replacement Part for 1100 Yards Advanced Dog Training Systems M86-1, M86-2 and M86N Compatible with PetSpy Advanced Dog Training Collars: model M86-1, M86-2 and M86N PetSpy Remote Transmitter Replacement Part - Collar is not included! Remote Dog Training Shock Collar - Train Your Dogs and Stop them from Barking 3 Training Modes: Static Shock, Vibration, and Sound. Operational Range is up to 1100 Yards