Warning that UFO sightings and alien abductions are on the rise, the Earthbound dogtag promises to help the hapless abductee return safely to Earth. The aluminum tag is die-stamped with information similar to that sent by NASA on the Pioneer 10 mission.

Engraved with several methods of locating Earth in the Galaxy, an alien pilot does not need to understand any human language to use this information. The mathematical location of Earth in relation to several important pulsars is represented by the radial diagram.

My favorite part is their money-back guarantee, the only bit which even hints that this might be a mere novelty item:

Should you ever be abducted by aliens while wearing Location Earth Dog Tags and not returned safely to Earth you will be entitled to a full refund of the purchase price.

Link (via The Presurfer)