Brennan Development Inc.

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For more than 25 years, Sonic Alert has been helping to provide peace of mind to families and loved ones through visual alerting systems designed to keep in touch with the events and activities around customers. The company s product line includes: baby cry and sound signalers; telephone and videophone signalers; doorbell signalers; combination signalers; clock systems and receivers. The company is headquartered in Troy, Mich., where it is privately owned. Sonic Alert employs nearly 35 people.