* Cheap price                                           
* Locate position precisely   
* Bi-Direction Phone conversation      
* SOS Emergency call function
* Geo-fence (park) function           
* Voice monitoring function
* Removable internal battery
* Build in movement sensor
for lower power consumption
* External battery ,which may use 7days(optional)
* Compact size, only 78*45*22mm(tracker size), 260*160*70mm(package size)
* Support SMS/GPRS
* Net weight:70g, Gross weight:355g