Security Devices International

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Security Devices International Delivers Rounds to the Military for Testing

09:29 EDT Thursday, August 20, 2009

MOUNT VERNON, VIRGINIA-(Marketwire - Aug. 20, 2009) - Security Devices
International (“SDI” or the “Company”) (OTCBB:SDEV) is pleased to announce
the final delivery of 40 mm LEKTROX Neuro-Muscular Incapacitation rounds to
the United States Military’s Joint Non-lethal Weapons Directorate (“JNLWD”)
for their final stage of testing and evaluation.

The results of testing will be combined with data developed under extensive
testing submitted to the US Government by SDI, the successful results of
which resulted in the funding for the Government certification testing. Upon
successful completion of the testing, the results will be reviewed by the
U.S. Military JNLWD and members of the United States Military Services for
use in making ammunition procurement decisions.

The initial round of testing commenced in December 2008 and evaluated the
effectiveness and safety of the electrical output compared to the Government
standard total body effects model.

The final phase of testing will consist of firing the projectile to
determine its suitability, effectiveness, accuracy, safety and consistent
effects against targets.

It is estimated that the final test report will be presented to the JNWLD
within the next sixty days.

Colonel William Lacey Jr. (US Army ret.) of SDI, is working closely with the
JNLWD to ensure they are supplied with the necessary information to complete
the required testing.

The Company is pleased that the testing and evaluation phase is nearing
completion and look forward to moving ahead with the United States Military
and into commercialization.

Aside from the U.S. Military, SDI has seen an increased interest in their
product by a number of other Militaries and Government agencies around the
globe.

More about SDI

SDI specializes in the field of less than lethal technologies for defense
industries. The Company is in product development of their patented 40mm
LEKTROX Neuro-muscular incapacitation round and expect to be in
commercialization this fall.

SDI is currently in the R and D stage of a 40mm blunt impact round that is
expected to have accuracy up to 300 feet. This round will achieve its
desired effect by using pain compliance.

SDI is located in Mount Vernon, Virginia, Toronto, Ontario and Tel Aviv,
Israel.

SDI is supported by an internationally renowned team of specialist in the
fields of electrical technology and ballistic engineering.

FOR FURTHER INFORMATION PLEASE CONTACT:

Security Devices International Inc.

Greg Sullivan

(905) 334-6655

[email protected]

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.