So a tracker can (called FA FlyAway) not prevent from flying a model aircraft - the recovery is however considerably easier: On the one hand you get yourself through simple phone call to the tracker a SMS with coordinates and a link to Google maps sent, so that you immediately see Simply click on this link, where the tracker and thus the flight model. On the other hand, a finder trigger by pressing the SOS button on the tracker itself such a SMS to the owner of the tracker. So when it comes to securing and locating objects, this tracker is very easy to use and recommend unreservedly with this low price. Due to the low Gwicht for airplanes or eg luggage or mail pieces that none may be lost if. Simply fooled, turn, and pursue at least 48h, where the tracker is. If you search the Internet for "TK102B instructions", you will find a Sicherheitsfirma24 a very nice and detailed instructions in German (the beiligende is quite short and English).
PS: You need a ormalgroße SIM card for the tracker, so that he can receive calls and SMS and myself send SMS with eg Kooridnaten! Take pre-paid, otherwise it could be costly if lost ...
Addendum 31/03/14, answer to a question of another buyer: If you turn on the tracker, it is only "boot" when the usual PIN request of the SIM card is deactivated. This query deactivation you need to perform in a phone or smartphone, as the Tracker so no keys or screen has it. Thereafter, when the phone when you turn interrogates no PIN, it does the tracker with this SIM not - and is harmless to boot and see satellites.