Features:
GPS stores location into cloud storage
Lightweight; Unreachable by pet when correctly attached to pet's collar
Long battery life; battery lasts for months with regular use
Alarm can be sounded allowing tag to be located 
When pet is out of Bluetooth range, Smartphone can notified and owner can locate the pet through the APP.
GPS allows you to locate your pet anywhere on a map
APP is called "Findmytag" in the Android and Apple stores