ZMI GSD-22a grenade
The ZMI GSD-22a "grenade" is a single use device which generates a powerful electromagnetic pulse over a given radius using a miniaturized flux compression generator and a small quantity of explosive. Integrated capacitors provide starting current to the generator which generates significant magnetic flux. The explosive is used to compress the flux, generating an electromagnetic pulse in the millions of amperes and tens of terawatts over a limited area. The immediate effect of this is to temporarily disable any improperly shielded electronics within the pulse's area of effect.
Such devices are prohibited to the public and for use only by the WJF and properly licensed corporate security.