GF21 Magnetic GSM Mini GPS Tracker Real Time Locator

NoteThis device needs a usable sim card. and it only supports the band -- 850/900/1800/1900 mhz. Please take care of it.NoteThis device needs a useful sim card. and it only supports the band -- 850/900/1800/1900 mhz. Please take care of it. GF21 mini car gps anti-theft tracking finder Feature: Two-way call: address book number calls with users. Remote Monitoring: A highly sensitive microphone that monitors the surrounding sound in real time in an emergency. Smart energy saving: turn off/on gps and data upload in time. Mobile customer/computer service platform, multi-control mode. Tips: Because it only supports 2g networks, network connections may fail if devices are located in low signal areas, such as remote areas, basements, etc.