The collar features a QR Code, which when scanned with your smartphone, leads you to a free app. In the app, you create an account and register all the necessary information for your dog, such as its name and your phone number. If your dog gets lost, you can press the special button and all nearby users of the app will receive a notification. If someone finds your dog and scans the QR code on the collar, you will receive a notification with its location. The person who found it will already know your phone number and will be able to contact you.