Built for control over 2 dogs. Half mile range with 6 levels of continuous stimulation. 2 stimulation buttons – one for each dog. You love dogs so much that you can’t own just one. With your Multi•Sport 2, you have reliable off-leash control of two dogs at the same time. A system that’s simple to operate. 3 stimulation buttons – one for each dog. Now your in control. Legendary Tri-Tronics convenience and reliability at an economical price. Each collar comes with a rechargable battery and charger.