Why did Garrett choose a wireless system that does not work with other systems?

The Z-Lynk system was developed because it has the lowest “latency” of any current or evolving technology. For instance, with traditional Bluetooth the delay in the transmission of sound allows you to swing several inches past a target before you hear a beep. The Z-Lynk system is up to six times faster, so you hear the target sound while the searchcoil is still over the object.