What does the "Collar" button under "Settings" do? Follow Halo Team March 25, 2021 18:46 Updated Environment Halo App Answer Under Collar, you can add a collar, edit a collar, and delete a collar. Related articles I have a growing dog; What size Halo Collar should I get? How to connect my collar to WiFi How to manage Prevention Feedback and Encouragement Feedback How to attach the Halo Collar to the provided strap What is the About button? Comments 0 comments Please sign in to leave a comment.