Features and functions: 1) GPS and GSM dual positioning function 2) Automatic SMS or GPRS continuous reporting with selectable reporting time 3) Internal SOS emergency button on the remote for help 4) Anti-theft reporting 5) Two preset numbers for remote monitoring 6) Uses siren to find the car in a parking lot 7) Automatic power saving mode 8) Wide input power range (DC 10V to 30V) ensures suitability for any vehicle 9) Easy DIY installation and hiding 10) Uses cellular phone, smart phone or man-serviced control center to track and monitor the mini security tracker 11) Tri-band GSM module for worldwide tracking and monitoring the highly sensitive GPS module 12) GPS, GSM and system operation status signal LED display 13) Uses SIM card phone book to set reporting number and parameters to make the interface easy 14) Immobilization function connects to traditional car and motorcycle alarm systems to add a GSM reporting function 15) Connects to traditional home alarm systems to add a GSM reporting function 16) Embedded vibration sensor for easy anti-theft reporting 17) Adds microwave sensor for complete anti-theft reporting 18) Embedded 750mAh rechargeable battery 19) Connects to PDA for navigation System structure: 1) GPS satellite 2) Base station 3) Control center 4) Mini universal security and tracking system 5) Smart phone 6) Cellular phone 7) Properties: a) Dimensions: 98 x 72 x 32mm b) Weight: 300g +/- 50g c) Power input: DC 10 - 30V d) GSM frequency: tri-band 900, 1800, 1900MHz e) Battery: 750mAh (rechargeable) f) Power consumption: i) Power-saving mode: