This portable GPS tracker features a large and visible SOS button that, when pressed triggers the GPS SOS alarm. The button is protected and grooved to avoid accidental pressing of the GPS security alarm button. Once the alarm is pressed, a 24/7 security monitoring centre is alarmed and depending on the situation, will inform authorities like police, ambulance or a security guard. Calls to 000 usually require identification and verification (who is calling, what is your location, nearest crossroad, etc)as these services get inundated with calls or often receive prank calls. Also, 'triple O service' (OOO) can only be contacted by phone. Some critical situations do not allow for a phone call.