This is a 100% passive mechanical switch. It requires no power supply. The only energy it requires is the force generated by the user who flips the toggle switch. It is immune to any kind of hacking by nature, as there is nothing to hack. There isn't even a circuit board inside. There are two keystone Cat 6 Ethernet RJ45 jacks connected together like a coupler with a toggle switch in between. With this switch, you don't need to trust in a software solution to effectively disconnect your device(s) from the internet. Such solutions can and have been compromised countless times by malicious entities and in some cases sabotaged in-house with virtually impossible to detect backdoors. Since this simple and effective kill switch is a physical/mechanical solution, it relies only on the laws of physics. This is the third generation of the original killswitch. This one is slightly smaller than its predecessor. When implemented (toggle cover closed), no data packets of any kind may pass through the switch. With the switch deactivated, full connectivity should be restored within a few seconds. Adhesive pad is included for surface mounting. Note: this is a 2-pin disconnect switch. Of the few other devices like this one available online, most are only a 1-pin disconnect, which in our testing is not sufficient to completely stop all communication. In fact, with only 1 pin disconnected, many computers will simply reconfigure the connection to work without that pin and resume connectivity almost completely unimpeded. With two pins disconnected, however, we have never seen a single data packet transferred to/from any devices connected to the killswitch while engaged. Please don't hesitate to send us a message if you have any questions.