Build-in GPS personal locator.
•  GSM /SMS communication or GPRS TCP/UDP connection .
•  Works worldwide!
      Support 4-frequency GSM 850/900/1800/1900 MHZ.(Optional)
•  High sensitivity,New technology and latest GPS SiRF-Star III chipset!
       Excellent for fixing the position even at a weak signal status.
       Work well even in areas with limited sky view like urban canyons•  Compact size, and smaller than one name card. Easy to hide
•  Very Low power consumption
•  Fast Signal Acquisition
•  Support single location and continuous tracking
•  Support  location triggered  by tracker
•  Support  location triggered  by authorized cell phone
•  Support  alarm and remote monitor
•  Support quick dialing buttons for 2 preset phone numbers
•  Support  check location by SMS  and Internet
•  Monitors can track the person without interfering him, 
       LIVE! Real-Time tracking!
•  Locate the locator holder by the mobile phone via SMS
                                                  (short messaging system).
•  SOS button send out exact location for immediate rescue/action.
•  Geo-fencing to restrict movement to a defined radius.
•  No monthly service charges to be paid to the call center 
  .

New feature:

★  waterproof bag;
★  optional magnetic mounted ;
★  with optional external battery ( extend to work for 7 days) ;
★  some optional accessory for pet such as collar ;
★  DIY Tracking!  ET230 can automatically commutation with most navigation map
          or Google earth by E-TOPWAY Decoder SMS modem.