The HKS physically cut the power going to the microphone/webcam and the wifi/bluetooth radios in the device. There have been several cases where either big government agencies or nearby hackers have remotely accessed these devices to turn on computers or otherwise view or listen in through the microphone or web camera. Software solutions of turning the camera on and off can be easily bypassed. The HKS physically cut the electronic circuit to the accessory. No power, no work. When the switches are thrown the accessory is, quite simply, off, and can not be remotely turned back on.
This matters as a security feature and for your own piece of mind. No longer do you have to worry about private communications being recorded or someone looking back at you through the webcam. Parents can especially enjoy this feature to help protect their children.
The switch for the WiFi can be thrown and along with pulling out the ethernet cord will ensure you the convenience of true off line computing. Then when you want to use either the microphone/web camera or the WiFi/Bluetooth, simply return power to the accessory by turning the switch.