Cirronet to Showcase Its M2M Technology Used in the Cooper Bussmann Cooper Invision™ Downtime Reduction System at Sensors Expo, Rosemont, IL, June 11-13, 2007

Business Wire, June 4, 2007

Exhibit Includes Broad Range of Cirronet and RFM Wireless Radio Modules and Devices

ATLANTA -- Cirronet, Inc. (a subsidiary of RF Monolithics, Inc. (RFM) (Nasdaq:RFMI)) announces its exhibit at the Sensors Expo Conference in Rosemont, IL, June 11-13, 2007, at the Donald E. Stephens Convention Center. The exhibit will include a broad range of Cirronet brand wireless sensor networking solutions and parent company RFM's brand of Virtual Wire[TM] short-range radio and RFIC devices that provide sensor data collection capabilities for a wide variety of applications. As a demonstration of those capabilities, Cirronet will showcase the Cooper Bussmann Cooper InVision[TM] Downtime Reduction System, an M2M condition-monitoring application that utilizes Cirronet's wireless technology in a custom-built wireless monitoring solution.

Cirronet is known for its wide breadth of high quality wireless solutions that enable wireless data when and where you need it. They will be exhibiting their complete line of embeddable OEM modules including their family of ZigBee[TM] modules and gateways, 802.15.4 modules, proprietary mesh modules, proprietary frequency hopping modules, Bluetooth([R]) modules and industrial 802.11g modules. Cirronet products are available in the 433 MHz, 900 MHz and 2.4 GHz license-free bands. Showcasing Cirronet products' suitability for industrial wireless sensor network applications is the Cooper InVision system that is built around a collection of Cirronet technologies.

The Cooper InVision solution is offered for industrial and commercial applications to reduce downtime and increase productivity by more quickly identifying open-circuit events caused by short-circuits and overloads. According to a comprehensive study of manufacturing facilities, an open-circuit event resulted in an average of 41 minutes of downtime with costs in some industries ranging from $300,000 to millions of dollars per site per hour1. By implementing the Cooper InVision solution, unscheduled downtime and associated costs may be reduced by as much as 60%, saving industrial operations millions of dollars per year.

At the heart of the Cooper InVision solution is a custom wireless sensor network developed by Cirronet that includes battery-powered, intelligent fuse sensor modules reporting through a robust, self-healing, wireless mesh network. The Cooper InVision solution identifies an open-circuit event via the intelligent fuse sensor module and then transmits notification of the open-circuit event over the mesh network to a web-based monitoring application that sends an urgent maintenance work-order request. The Cooper InVision solution has shown 99.999% event transmission reliability even in the most extreme environments.

The RFM products exhibited include: 1) Virtual Wire short-range radio devices based on RFM's ultra low power, proprietary amplifier-sequenced hybrid (ASH) radio architecture and are available in 303.825 MHz, 315 MHz, 418 MHz, 433.92 MHz, 868.35 MHz, 914 MHz, and 916.5 MHz license-free bands, and 2) RFIC products that include PLL-based, single- or multi-channel transceiver, transmitter and receiver products and evaluation boards available in 300-1,000 MHz license-free bands.

About Cirronet

Cirronet supplies wireless modules and box products for the industrial market to device OEM manufacturers, integrators, and end users. Its products enable customers to wirelessly monitor and control electronic devices by establishing wireless connection between machines and the Internet. Its OEM modules are incorporated into custom wireless solutions ranging from portable heart monitors to overhead crane controls, and its industrial box products provide wireless connections in harsh industrial environments. Cirronet's products are based on proprietary and industry standard protocols that include ZigBee[TM], Bluetooth[R], and WIFI; and they operate in the license-free 433 MHz, 900 MHz, 2.4 GHz and 5.8 GHz ISM bands. Please visit Cirronet's web site at www.cirronet.com. Cirronet is a wholly owned subsidiary of RF Monolithics, Inc.

About RFM

Celebrating over 27 years of providing low-power wireless solutions, RFM (Nasdaq:RFMI), headquartered in Dallas, Texas, is enabling the next generation of wireless applications with a solutions-driven, technology-enabled approach to wireless connectivity. RFM provides the connections to extend the edge of the Internet to communicate with the billions of unconnected machines through a broad range of low-power wireless solutions - from comprehensive industrial wireless sensor networks to high-performance RF components. RFM was named to M2M Magazine's "2007 M2M 100," a list of the most important and influential machine-to-machine technology providers. For more information on RF Monolithics, Inc., please visit the Company's website at http://www.rfm.com.

About Cooper-Bussmann and Cooper Industries

Cooper Bussmann, a division of Cooper Industries (NYSE:CBE), is headquartered in St. Louis, Missouri, and manufactures and markets circuit protection products and services globally for the electrical, electronic and transportation industries. Additional information about Cooper Bussmann is available online at www.cooperbussmann.com. Cooper Industries, Ltd. is a global manufacturer with 2006 revenues of $5.2 billion, approximately 85 percent of which are from electrical products. Incorporated in Bermuda with administrative headquarters in Houston, Cooper employs approximately 31,000 people and operates eight divisions: Cooper B-Line, Cooper Bussmann, Cooper Crouse-Hinds, Cooper Lighting, Cooper Menvier, Cooper Power Systems, Cooper Wiring Devices and Cooper Tools group. Cooper Connection provides a common marketing and selling platform for Cooper's sales to electrical distributors. For more information, visit www.cooperindustries.com. For information specific to the Cooper InVision Downtime Reduction System, visit: www.cooperbussmann.com/invision.>