If you have serious jealously issues and you’re the stocking type, you need one of these in your spy kit/stocking arsenal. What is it? Low jack for your girlfriend, of course. This tiny device is a GPS transmitter, and for a nominal fee ($40-90) can send text messages to your cell with the device’s coordinates. If additional details on location are required the system can integrate with Google Earth to provide photo location within 3 meters of the tracking device. The World Tracker SMS can also double as an actual low jack vehicle for your device. Set the World Tracker to ‘park mode’ and if the vehicle is moved more then 100 meters an alert is sent via text message. Weighing just 3.1oz and measuring 2.56 x 1.7 x 1.1 inches it has to make the World Tracker SMS one of the smallest stand alone GPS transmitters. The regular battery is rated at 24 hours, but with the backup battery attached expect 4 days of juice.
Available here for $600 (doesn’t include SMS monthly fee).
Product page here.