This is a device used by NSA for the purpose of surveillance and also to harass people. Now these hi-tech electronic gadgets are used in India at the level of private security agencies who are mean't for domestic surveillance. In the name of surveillance they are harassing people forming gang and in different other ways. This is to make aware about the private security agencies, and at what cost they are being hired by general public for pre-marital or post -marital or getting information about employees through surveillance. There are different other sister concerns under home ministry,like police dept.,CBI, etc., are using such devices.This is violation of human rights.
This is called the actual 'Emotional Atyacher' done by domestic security agencies and not what they show in TV, protecting their own image.
Before commenting please read these articles:

http://hubpages.com/hub/Remote-Neural-Monitoring--A-Technology-Used-For-Controlling-Human-Brain

http://www.iahf.com/nsa/20010214.html

http://www.biz2success.com/2010/06/do-you-have-any-success-stories-on-how-to-cope-with-electronic-harassment/ (most important,for symptoms). What will you do if such surveillance is applied upon you.