Andoer Mini Global Real Time Tracker A8 Gsm/850/900/1800/1900mhz Gprs Tracking Device with SOS Button This product is used the Taiwans newest technology, which has the advantages of small and exquisite volume, clear voice, long standby duration, simple operation, stable performance, easy installation It is mainly used for home monitoring; children, old people, pet supervision monitoring; car, warehouse security tracking