http://www.telegraph.co.uk/news/main...wdenial118.xml

The heatwave weapon can, by contrast, target troublemakers from
750 metres. It works by dispatching high-powered radio waves from
a vehicle antenna, similar to a satellite television dish, causing
the molecules in a target's skin to vibrate violently, creating a
burning sensation.
--
73, Cecil http://www.w5dxp.com