RedKnows SBX-3 Mini Tracker is a GSM/GPS-based alarm and tracking system that helps you exercise complete control over your boat, car or other property when you are not there. You install the alarm's main unit in your vehicle as well as GSM and GPS antennas that then can communicate with your mobile phone as well as the remote control included in the package. With the help of the mobile phone you can then verify that the boat/car is where you left it. If someone breaks in or steals your vehicle, an alarm and report are simultaneously dispatched to you. You can then follow the position of the alarm-equipped vehicle on a map here on our home page.