Garmin PRO 550 Dog Tracking-Training Device North America System Train up to 3 Dogs. This dog training device from the experts at Garmin lets you choose from 21 levels of continuous and momentary stimulation tone and vibration for up to 3 dogs at a time. The Garmin PRO 550 Dog Tracking & Training Device w/ Built-in BarkLimiter features a built-in BarkLimiter which includes the Autorise technology which automatically adjusts correction to the optimum level needed to stop unwanted barking. The Garmin PRO 550 Dog Tracking/Training Device comes with 2 sizes of removable stainless insulated contact points for reliable performance in wet conditions and extended comfort for the dog. The Garmin PRO 550 Dog Tracking-Training Device w/ Remote Control allows advanced training for the serious professional to keep the peace at home and your dog well-trained. Specifications for Garmin PRO 550 Dog Tracking-Training Device: Manufacturer: Garmin Color: Black Condition: New Features of Garmin PRO 550 Dog Tracking-Training Device w/ Remote Control: Train up to 3 dogs at a time (additional dog devices required; purchase separately) 21 levels of continuous and momentary stimulation and vibration and tone settings Up to 1mile range Built-in BarkLimiter operated on the dog device Remote operation of beacon lights on dog device Package Contents: Garmin PRO 550 Dog Tracking/Training Device Garmin 010-01202-00: PRO 550 Dog Tracking-Training Device North America System Train up to 3 Dogs