... -in Super Magnet (Optional) GPS Tracker,gps tracking,tracker,vehicle gps tracker GPS module: SiRF Star III GSM/GPRS module ... GPRS Two-way conversation Built-in speaker and microphone SOS emergency call function Geo-fence function Voice monitoring function Built-in ... internal battery Re-branding acceptable GPS Tracker,gps tracking,tracker,vehicle gps tracker GPS module: SiRF Star III GSM/GPRS ...