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Bosch Commences Tender Offer for Detection Systems Inc.

20 December 2000

Bosch Commences Tender Offer for Detection Systems Inc.

    BROADVIEW, Ill., Dec. 20 Bosch Security Systems
Corporation has commenced its previously announced cash tender offer for any
and all outstanding shares of Detection Systems Inc. at $18.00 per share.
    The tender offer documents are being mailed today to shareholders of
Detection Systems.  The offer will expire at 12:00 midnight Eastern Standard
Time on January 19, 2001, unless extended.  The offer is conditioned on two-
thirds of the shares being tendered and on completion of customary regulatory
review.
    The Board of Directors of Detection Systems has unanimously recommended
that Detection Systems' shareholders accept the offer.
    Bosch Security Systems Corporation holds an option to acquire
approximately 7 percent of Detection Systems' shares from senior management
members, and an option of acquire newly-issued shares representing
approximately 14 percent of the shares on a fully diluted basis.
    Bosch Security Systems Corporation is a wholly owned subsidiary of Robert
Bosch GmbH, which already owns approximately 3 percent of Detection Systems'
shares.
    Robert Bosch GmbH is a $30 billion global company with activities in
automotive components, consumer products, capital goods and security products.
The security division of Bosch has annual sales of approximately $450 million.
    Detection Systems designs, manufactures and markets electronic detection,
control and communication equipment for security, fire protection, access
control and closed circuit television applications.  The company is
headquartered in Fairport, New York and has subsidiaries in twelve countries.