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Alarm and Chime Products

Did You Know?
STI has over 1000 push buttons?

Buttons & Switches
Did You Know?
You may spot a Stopper during your next vacation: St. Louis Arch, San Francisco, Antartica, Disney, etc.

Stopper II
Did You Know?
Can’t hear your existing doorbell in your basement, garage, shed, etc. With wireless ease extend the chime to greater distances.

Extend Chime
Did You Know?
Stopper II has been helping stop false fire alarms for over 30 years.

Stopper II
Featured Product

ED-55
Rex Plus® II Electronic Watchdog

learn more

About STI Alarm and Chime Products

Alarms and chimes act as inexpensive security devices helping to stop theft, misuse and vandalism.

A medicine cabinet chime and a gun cabinet chime serve different end purposes, for example, but are essentially both security devices to help prevent unauthorized entry.

An Exit Stopper, garage door alarm, other open door alarm or window alert prevents theft from home or business premises, while a wireless chime or alert protects mailboxes, driveways, sheds and fences.