WASHINGTON, DISTRICT OF COLUMBIA-(Marketwire - Nov. 3, 2011) - Security Devices International (SDI) (OTCBB:SDEV) is pleased to announce that it participated in the NATO sponsored North American Technology Demonstration on October 26th and 27th in Ottawa, Canada.

The 2011 NATD show, co-hosted by the Canadian Department of National Defense and the United States Department of Defense, Non-Lethal Weapons program, presented non-lethal capabilities with the potential to support NATO military personnel and their missions. The show was attended by Military and Government agencies from around the world.

The show consisted of an exhibit hall and a live fire range demonstration. SDI was involved in both components of the show. The Company displayed its Blunt Impact Projectiles and Wireless Electric Projectiles during the exhibit day and was proud to have the opportunity to demonstrate their Blunt Impact projectiles during the live fire range day.

SDI received positive feedback on both rounds and received requests from Government agencies in numerous Countries to have further discussions or demonstrations regarding SDI’s line of less lethal 40mm munitions.

About Security Devices International Inc. SDI is a less-than-lethal defense technology company, specializing in the development of innovative next generation solutions for security situations that do not require the use of lethal force. SDI is currently in the advanced stages of deploying their patent pending family of products. These products consist of; the Blunt Impact Projectile 40mm (BIP40), and the Wireless Electric Projectile 40mm (WEP40). The Market sectors for these products include; the military, army, navy, air force, peacekeeping, homeland security, and law enforcement professionals. The Company’s products were designed for use in existing 40mm launchers.

Security Devices has not authorized the release of this press release in any form that contravenes any law or regulation and will not be responsible for the unsolicited distribution of this material by e-mail or facsimile by unauthorized parties. Statements in this press release, which are not historical facts, are “forward looking statements” within the meaning given to that term in the private Securities Litigation Reform Act of 1995.

Security Devices intends that such forward -looking statements be subject to the safe harbors created thereby. Since these statements involve risks and uncertainties and are subject to change at any time, actual results could differ materially from expected results.

For more information about the Company visit: www.securitydii.wpengine.com.