Tri-Tronics Pro 550

GARMIN PRO 550 allows intuitive control for serious trainers with easy access to 21 levels of momentary and continuous stimulation, vibration and tone setting, and the ability to quickly select a particular dog if training up to 3. PRO 550 features remote operated beacon lights on the dog device for low light, the ability to add an Upland? Beeper (sold separately) and a built-in BarkLimiter, activated on the dog device.