Introducing the new PRO Series: PRO 70, PRO Trashbreaker and PRO 550. Using proven Tri-Tronics technology, these simple, easily operated, multi-dog training systems allow intuitive one-hand training so you don't have to take your eyes off your dog. Plus, easy access to different stimulation levels and tone, a built-in BarkLimiter, remote control of beacon lights, interchangeable contact points, and more.