More details please! Brand? Where to buy?
Thanks!
It's a cheap china thing, but it works fine. I got it from
www.chinavasion.com , but as i looked now, they don't have it anymore.
But perhaps this is something similar, perhaps better :
http://www.ebay.com/itm/New-TK102-M...716?pt=LH_DefaultDomain_0&hash=item4ac08bfd44
Anyway, most of these cheap 40$ trackers have atleast 10 hours of battery and work rather good so i use mine on my drones when i do longer flights.. you can't 100% trust the failsafes?!

I also use it on my kid who is 7 when he's going somewhere by himself, it has an alarm button which sends me an SMS with cordinates, and then calls my phone so i can hear him.