https://www.ourpcb.com/remote-kill-switch.html
What Is a Remote Kill Switch and How Does It Work?
where you can turn off vehicles if they go beyond a preset range. So if you have a project requiring a remote kill switch, here's how you build the device.
what is aremote kill switchand how
https://thehackernews.com/2014/06/intel-developing-rfid-tracking-and.html
Intel Developing RFID Tracking and Remote Controlled 'Kill Switch' for Laptops
Intel Developing RFID and Remote Controlled 'Kill Switch' to provision, track and monitor devices such as laptops.
rfid trackingremote controlledkill switchinteldeveloping