Like a traditional dog tag, the Dog-e-Tag lists a dog's name, and the owner's address and phone number. But the Dog-e-Tag can also hold e-mail addresses, alternate phone numbers, veterinarian contacts, vaccination records and even allergy and other health alerts (such as "I am an old dog and can't see very well."). Unlike RFID-based ID chips that are inserted between a dog's shoulder blades, the Dog-e-Tag doesn't require specialized equipment to read. In fact, it can display up to 40 lines of data in multiple languages. The Dog-e-Tag is waterproof to 165 feet, scratch and shock resistant, operates in temperatures between 14°F and 160°F, and backlit. It's available in six colors and retails for $39.95.