USB Killer was developed with innovative new technology that has never been used before, and it all fits into what appears to be an ordinary USB memory stick. Inside the drive is an inverting DC/DC converter that charges several capacitors to negative voltage. When this voltage is reached, the converter switches off, and a transistor opens to discharge the voltage back into the USB port. This cycle runs as a continuous loop until the USB drive is inoperable, which occurs in less than 3 seconds.