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 For Immediate Release

Slim, great looking & wireless, the WS4979 can be located at strategic locations around the home

ISC WEST -- Las Vegas, Nevada, Wednesday, April 2, 2008 – Utilizing our unique wireless technology and the latest production techniques, the WS4979 features a slim design and is VERSATILE fitting nicely on homeowners’ inside walls or other convenient locations. The WS4979 has all of the same functions as DSC’s WS4939 4-button wireless key and can be mounted or installed easily, at minimal cost.

The WS4979 wireless wall plate provides four programmable function keys in a fixed location. Arming, optional disarming and a number of additional keypad functions can be easily programmed for wireless operations. Users have more control and FLEXIBILITY with their security systems by operating their favorite keypad functions on WS4979 wall plates located at suitable or desired locations.

The WS4979 wireless wall plate is built with reliable 433 MHz technology, uses long life lithium batteries and is COMPATIBLE with the following receivers and systems:

PowerSeries™ RFK Keypads: RFK5500, RFK5501, RFK5516, RFK5508;

PowerSeries™ Wireless Receiver: PC5132; MAXSYS® PC4164 Wireless Receiver;

PowerSeries™ 9045 & 9047 Self-Contained Wireless Panels; & RF5132 Wireless Receiver Module

DSC designs and manufactures exceptional products that work when it matters most.

The WS4979 Wall Plate is available in the U.S. and Canada. For more information visit www.dsc.com, ISC West booth #23001, or online at www.dsc.com.

Contact:

Denise Bruley, Communications & Public Relations Program Manager

DSC

(905) 760-3000, ext. 2414

Tyco Safety Products - Intrusion Security

Tyco Safety Products Intrusion Security business unit, through its leading brands DSC, Sur-Gard and Bentel, provide security professionals with products of superior quality and performance in more than 140 countries worldwide. They include alarm control panels, keypads, user interfaces, detection devices, alarm communication products, structured wiring and industry-leading alarm monitoring technology.

About Tyco International

Tyco International (NYSE: TYC) is a diversified, global company that provides vital products and services to customers in more than 60 countries. Tyco is a leading provider of security products and services, fire protection and detection products and services, valves and controls, and other industrial products. Tyco completed the spin-off of its healthcare and electronics businesses on June 29, 2007 and today has annual revenues of more than $18 billion and 110,000 employees. More information on Tyco can be found at http://www.tyco.com.