Cyborg Unplug is a mechanism that detects when a device is within range of your router and triggers an alarm. If you want, you can prevent it from stealing your WiFi even if it has the keys. However, you can also block the internet connection completely, which is illegal.
Cyborg Unplug goes a lot further as it can also prevent scrambler devices from connecting to your network even if they have the keys.
More interesting and at the same time controversial is the All-Out Mode option, which blocks the internet connection of the above devices and prevents them from connecting to the internet, not even to any network other than yours. You will not be able to reconnect until you are out of range of Cyborg Unplug.
Cyborg Unplug is not a wifi jammer, which means it does not interrupt or distort WiFi signals. It simply detects the MAC addresses of the devices in range and sends them disconnect signals to prevent them from entering your network or others if you wish.