※ Please read the profile. This is a lost pet tag that allows you to check your pet's location using a QR code. It comes in a set of 3. No individual sales. Each tag is valid for 1 year, so this is for 3 years. It provides peace of mind as it can help you find your pet if they get lost during walks or escape. Please attach it to your pet's collar or harness. - Model Name: LEADOG - QR Code Service: Yes - Features: Location information display, status notification - How to use: Scan the QR code to check your pet's information - Expiration Date: 1 year Available for immediate purchase.