using the network of other samsung smartphones, it's easy to locate
no need to activate bluetooth to make the smarttag ring. it's positioned via the network of all samsung smartphones passing nearby (and visible on a google earth-type map). when you're close (between 100m and 5m) the indications are limited but at less than 5 it's very precise. and the smarttag's ringtone is clearly audible.
the ability to make the smartphone ring is also very practical