The slimmest GPS tracker that you have met. This ultra-slim GPS tracker, with GPS and RFID function (optional), is specifically designedfor students, worker, employee and children. If you like, you can even conceal the GK309E in seams of clothing, handbags, luggage etc. The live tracking allows you to follow your device in real time, and a full history report is retained on your personal mapping panel. As a combination of low cost cell phones and wireless GPS tracking devices, it supports SOS, family numbers, non-disturb mode, listen-in, various alarms, etc.