What is the SOS feature and how does it work?

Helo device sensors can detect if you fall with the Guardian feature and provides your emergency contacts with information thanks to the SOS feature. It is set to send messages to your contacts in case of emergencies or panic situations, informing them about your emergency situation and exact GPS location. 

Please note: The service requires a Smartphone with an internet connection to be within not more than 20 meters or 65 feet from the device. The service is limited to 6 SMS a day.
What is the Guardian feature and how does it work?