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Wireless Alarms and Wireless Alerts

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

Stopper II
Did You Know?
Polycarbonate is so strong it is used for “bulletproof” windows and other applications requiring great flexibility and strength.

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

Stopper II
Featured Product

STI-6517B
Wireless Stopper® Station Shield with Sound and Transmitter

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About STI Wireless Alarms and Wireless Alerts

Wireless alarms and wireless alerts are as flexible as they are secure.

Door alarms, driveway monitors, theft stoppers, motion-activated alarms, burglar stoppers and garage sensors can all work using wireless technology, giving you both freedom and easy installation.