The Garmin PRO Trash breaker with proven Tri-Tonics technology allows intuitive 1-hand training and control of up to 9 dogs from a range of up to 4 miles. A top-mounted selection dial provides 6 levels of stimulation intensity and a tone setting for adjustability without complexity. Remote-operated LED beacon lights help you locate your dog in low light conditions. And a built in Bark Limiter, activated on the dog device, helps keep the peace at home.