XTool Anti-Theft Tracking System - Version 7.4 The award-winning system that uses patented technology to assure portable and desktop computers are safe and traceable. The XTool transmitter secretly sends a signal to the Stealth Signal Control Center via telephone or internet connection, allowing our Recovery Team, with the help of the local authorities, ISP and telephone companies, to track its location when reported lost or stolen. Each signal received by the Control Center provides enough information to track the location of the computer in the case of a loss or theft.