GF07 Mini Magnetic GPS Tracker Real-time Car Truck Vehicle Locator GSM GPRS USA
GSM Band: 850/900/1800/1900Mhz. Reset the phone: Send number 444 to alarm phone. Reboot the phone: Send number 999 to alarm phone, start success after 1 minute. Expansion Card: Mini TF card. Sound monitoring: Send number 666 to alarm phone.