The usb killer is a simple usb drive.It can be operated even by a layman.This stick has the ability to damage electronic devices like computers,consoles and cars.If the flash drive is inserted in the CPU,we could be sure it will finish its job perfectly.

When we plug direct current - direct current,a converter begins to take up energy from the server.Then it accumulates the power in the capacitors.Then the capacitors acquire voltage approx-220v and the device kills the power present on the usb data lines.After that,the server stops responding and the usb stick carries out on-off process again and again until it gets hot.

If the usb killer is connected to a smartphone using a connector like OTG adapter,then the indict port gets fried out but the phone will be safe.
Apple has already started taking steps against this with its notebook line-up.Not only the android devices but also the macbooks have numerous usb-c ports as a chager.If the fried out devices are not seperated,it wont be possible to say how harmful the damage can be.Its expected that the flow passes through CPU and other core devices.

The screen will not return back to normal unless rebooting is done.People who have suffered a loss due to the usb killer in the pc,had the only solution of replacing the mother board of the cpu.This solution will help not only hundreds of millions of devices,but perhaps billions of devices with unprotected usb ports.