PetSafe Additional training aid collar for dogs

The PetSafe® Add-A-Dog® add-on receiver collar and the PetSafe® Add-A-Dog® Lite add-on receiver collar can be used to add a second collar to an existing PetSafe® training aid or to replace an existing collar. The PetSafe® Add-A-Dog® standard receiver collar will work with standard 300-meter, 600-meter and 900-meter training systems. It's perfect for most dogs and provides safe, effective stimulation to get your dog's attention.