A "wireless tazer" was demoed at the German European Symposium on Non-Lethal Weapons — it uses a schpritz of vapour as a conductive medium for its shocks.
The Plasma-Taser will not need any wires because it fires an aerosol spray towards the target, which creates a conductive channel for a shock current, claims Rheinmetall. The company refused to comment on exactly how the weapon works, but it says the aerosol material is non-toxic.