The Garmin PRO 70 with proven Tri-Tronics technology provides intuitive one-hand training and control so you don’t have to take your eyes off your dog. A top-mounted selection dial provides for 6 levels of stimulation plus tone setting, for adjustability without complexity. With additional dog device collars (purchased separately), the PRO 70 can expand to train up to 6 dogs. The front buttons are even color coordinated to correspond to each dog’s collar. Remote operated beacon lights on the dog device help you locate your dog in low light situations. And, the built in BarkLimiter, activated on the dog device, helps keep a quieter kennel at home.