— We'll Beat ANY Competitor's Written Estimate by 10% —

Thumb Alarm Systems, Logo Your Hometown Security Company
2513 Imlay City Rd., Lapeer, MI 48446
(810) 664-6606
Thumb Alarm Seal

Protect You and Your Loved Ones For Less Than a $1 a Day

Our Partner Dealers
Total Connect Services
Digital Security Controls
First Alert
Bosch Security Systems

About Us

Our security company in Lapeer, Michigan, offers affordable and efficient residential and commercial alarm systems. Since 1956, locally and family-owned Thumb Alarm Systems has strived to provide every home and business with quality service, cutting edge technology, and a partner against crime. While other security companies may be in another city or another state, we're based in Michigan and serve Michigan residents and business. Some customers are amazed that they can come to our location and walk right in our door. Thumb Alarm Systems is a member of the Lapeer Chamber of Commerce and the Kiwanis Club of Lapeer.

When You Call Us Today

Pay Online

The Area's Leading Security Company

Do you feel safe in your home or place of business? You will always be able to answer "yes" when you invest in security equipment from Thumb Alarm Systems. We specialize in sales and installation of state-of-the-art security alarm systems, fire alarm systems, and CCTVs for your protection. These are name-brand products that provide 24-hour protection. The security of your home, business, family, and employees is important to us, so we offer comprehensive advice about:

Key Pad

Alarm Systems


Family Safety


Area Safety


Around the House


Business Safety 


What to Look for


Finding a System

Request an in-home presentation from Thumb Alarm Systems

If you are interested in meeting with a security consultant to discuss your residential or business needs, please call (810) 664-6606 to set up an appointment.

Thank You for Your Continued Business!

Please Note:
Shoreline Investment Services handles the billing for Thumb Alarm and A-Communications. For any questions, please call (810) 664-0465 or email us.

Testing Your Alarm System

Please follow these steps monthly to ensure that your system is communicating properly with our monitoring station:

  1. You will need your correct account number and/or correct pass code.
  2. Call the monitoring station. This phone number is on the call cards you received from us. (If you do not have a call card, please call or email our office and we will send you new ones.)
  3. Give them your name and/or your business name, account number and pass code.
  4. Ask them to put the system in "test." (Test means they will not dispatch if a signal is received.)
  5. Arm your system, go through the entire home or business and set each device off. The siren needs to go for about 40 seconds. If you need to test a sump pump monitor please contact our office for specific instructions.
  6. Call the monitoring station back and ask if they received the signals. They should have a signal for each device that you set off.
  7. If they received the proper signals, ask them to take it out of test (or it will remain in test until midnight). You have successfully tested your system.
  8. If they did not receive the proper signals, please call our service department at (810) 664-6606.


Thank you for your interest. For questions or comments, please use the information listed here. We look forward to hearing from you soon.

(810) 664-6606

Hours of Operation
Monday – Friday: 8 a.m. – 5 p.m.
Technicians Available 24/7

2513 Imlay City Road, Lapeer, MI  48446

Service Area
 Lapeer County & All of Michigan

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