It claims that they work similar to using Data Spike on devices.
Problem is the requirement to overcome the target's Object Resistance first.
I can see it smashing through cheap sensors and electronics. (small number of condition boxes and a resistance of 9)
The good stuff will be able to take a beating before bricking. (good number of condition boxes and a resistance of 15+)
If it could be farther resisted with firewall, both would be near useless.
But the page reference (
SR5 p.295) is for the Object Resistance Table in the
Magic chapter, and Object Resistance is a
dice pool, not a threshold. I suppose the DSP Grenade uses the Thrown Weapons skill and the DSP Static Gun uses, what, Gunnery? Heavy Weapons? Exotic Weapon? Opposed by a standard Reaction + Intuition defense test, or Intuition + Firewall like a Data Spike, or the Object Resistance dice pool? "Number of net hits is equal to the net hits over the initial DV." ... what does that mean? Do the net hits from the attack add to the listed DV (10 for the grenade, 15 for the gun), or something else? Is that supposed to be Matrix Damage? I can't puzzle it out.
