AnimalRescue.com Q-Tag QR Code Pet ID Tag for Dogs & Cats GPS Enabled - Digital Pet ID System Digital Pet ID Tag: Store Contact Information including multiple phone numbers, address, email, identifying images, behavior assessments and more. Links to AnimalRescue.com and requires no special app. Compatible with all QR code reader apps for Apple and Android devices. GPS Enabled: Real-time alerts on all scans. We email you if your pet has been scanned and show you on a map the last scan locations. Laser engraved anodized aluminum "rust proof" tag. Double sided w/ a lifetime warranty.