Types Of GPS Tracking Devices: GPS Logging Device:  These are passive GPS tracking devices.  These GPS devices store and record information received from GPS satellites in space.  When the user would like to see where the device has been, they can take the device plug it into a computer and download the information from the device.  The Trackstick and Trackstick Pro are two such logging devices.  The benefits of these devices is that they are fairly inexpensive and have no monthly service fee associated with them. Real Time GPS Tracking:  These GPS devices receives information from GPS satellites in space.  Once received, the information is transmitted back to a user, who can view the information.  Two popular ways the GPS tracking device transmits location information is via a digital cellular network or via satellite. GPS Vehicle Hardwired Devices:  These GPS devices are permanently installed into your vehicle.  There is usually a "brain" which includes the GPS receiver and a transmitter module for sending the data out.  The "brain" is generally placed under or inside the dash area of your vehicle, along with a small external antenna (included with device).  GPS antennas can read signals through most materials except metal. Personal GPS Devices:  These are typically smaller sized devices that have a built-in internal battery.  Our Personal GPS trackers have a typical battery range from 10 - 30 days.  These GPS tracking devices can be used to track people, property and even vehicles. DeWalt DS500 GPS Mobile Alarm:  This is a very unique and versatile product.  Can be used anywhere theft is a problem.  The device is robust with a tamper sensor, door sensor, vibration sensor, and even a temperature sensor.  When alarm is triggered device sends SMS text message, as well as a recorded voice call notifying you of the alert.  From any web enabled computer, you can also do a locate on the Mobilelock, whose real-time position will be displayed.  You can also arm and disarm the MobileLock from any telephone or web enabled computer.  There is a  monthly subscription fee of $19.95, which includes 5 locates per month and unlimited alarm activations, messages and alert phone calls. Satellite Tracker & Messenger:  The SPOT satellite tracker messenger is a pretty powerful, low priced satellite tracking device.  It works pretty much around the world and here is why:  The device receives GPS location data and transmits the data backup to a satellite.  The SPOT unit works where cell phones fail, as it uses satellite to satellite transmissions.  Now, here is why SPOT is pretty darn cool.  For around $100 per year, SPOT is a device that calls for help when you need it, press the "911" button on SPOT and it notifies GEOS International Emergency Response Center every five minutes until cancelled.  GEOS in turn will contact your local emergency service provider, be it the Coast Guard, Sheriff's Department, Police Department, etc.  For an additional $49 per year, SPOT can be used to record your tracks that other people who have access to your account can view online.  You can learn about the additional features SPOT has to offer by following this link, SPOT Personal Satellite Tracker