AS-19B GPS tracker.
When you open the package it seems that it is very user friendly. You place the SIM card in the GPS Tracker and install the GPS Monitor software on your mobile phone. It seams clear, however you are advised to read the manual first and then follow the directions. In order for GPS Monitor to work you have to activate it and connect it to your mobile phone. It seams simple, however it is essential for it to work properly. You have to send a registration SMS to the GPS Tracker in order to connect it to your mobile phone and number.