SOS call: With SOS call button and two-way voice function, the kid/sensor can press the SOS button and talk with the host for help. Perfect size to be interchangeable and has real-time tracking. Set up instructions were easy, just plug in the SIM card and download an app. cheap price and good for luggage so airlines don’t lose it when you are traveling. Geofence: After the geofence is set up, the app on smartphone wil […]