Signals Defense provides products that meet TEMPEST requirements to protect classified information from electronic eavesdropping. Their patented window films have been installed in over 1,300 government and commercial buildings to block radio frequency and infrared signals. They offer a range of shielding accessories and security glass and polycarbonate products to create a secure work environment. With a 16-year track record, Signals Defense is the sole provider of the world's most effective optically clear electronic eavesdropping countermeasure.