Add another dog to your current SportDOG Brand Contain + Train system (SDF-CT) or replace a Collar Receiver with the SportDOG Brand Contain + Train Add-A-Dog Collar. The Contain + Train dog collar system's Containment mode expands to any number of dogs and the Training mode expands to 3 dogs. This dog collar gives you the ability to secure your dog(s) within a set boundary, and remotely train both inside the boundary at home, and outside the boundary while in the field when paired with your existing Contain + Train™ system. The dog collar's Anti-Linger feature prevents dog from running down the collar receiver battery in containment warning zone. The dog collar's Training mode offers 7 instantly selectable static stimulation levels in low/medium/high stem ranges.

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