Oh please...the Daily Mail is exaggerating this thing in a very serious way.
Articles about this device came out several months ago...it does essentially do what the Daily Mail claims it does--inflict pain without leaving a mark--but it's not designed as a torture device...the idea is a sort of forced "drop your weapons" type of command intended for the taking of prisoners. It's actually a very sensible type of weapon...much more effective as a stun device than current weapons are.
And no, it's not equal to anything experienced in a torture chamber...ignore the Daily Mail's idiotic Fox News-like pumping up of emotions and idiocy. The Daily Mail is a rag not fit to be used as toilet paper, let alone read.