This product is out of stock, and not coming back.
It may have been replaced by a newer version, see replacement/alternatives listed below.
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this is good really good product
Device sends an sms message to requesting phone. Requests are via sms with password or via one of the sos phone numbers (you have set on the device) ringing the device 3-9 rings and hangup. 10 Rings should enable you to listen-in to the device (two way communication). The device simply flashes when your sos phone number calls in. Call out to your sos numbers by holding the device's sos button for 3 seconds and release (gps sms is sent and call placed), holding for 6 seconds and release to simply send sms. All commands are sent via sms to the device. You can request the device send regular location texts (eg update every minute etc) or simply request on demand. The device supports GPRS and could be set up to update a website directly (requires internet service with your network provider).
Output sms example...
*001f2c07*06910.9384,E,3431.1742,N,0.04,119.15*280109,122306.000**
Format is...
*HexRef#?*Latitude,E/W,Longitude,N/S,Speed,Course/AngleinDegrees*Date,TimeGMT**
If you set a phone or pc/phone to parse your sms messages you could automatically display your location on a map, the above information on google maps would look like this...
http://maps.google.com/maps?q=069+10.5068+E+34+31.0896+N()
Hope that helps... this device is a really well priced gps tracking solution