Originally Posted by
njkayaker
Things like "Tile" work at very short distances (no more than 100 feet is optimistic). The Tile is as big as it is to hold a battery.
How lojack works is interesting. (It relies heavily on not ever running out of power.)
https://en.m.wikipedia.org/wiki/LoJack
The Tile works over any distance by communicating with the internet via cell service. You can put it in yoir luggage and trace it no matter where it shows up.