TRAX http://www.traxfamily.com/gps-tracker-for-dogs.html…

Trax is one of the smallest and most technologically advanced personal GPS locators, with fantastic accuracy and a battery life of one day. Its reliable tracking technology updates positions with an intelligent real-time algorithm.
The intuitive app allows you to monitor your belted ones in real-time, and a built-in SIM card with two years of free data and free roaming in 33 countries means you can use Trax wherever you are, even when you travel. Create your own safe zones with the Trax App Geo-fence tool.
Receive alerts whenever your belted enters or exits those areas.