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Introducing the Smoke Detector Tester from SDI, designed to keep your family safe and secure in any emergency. This versatile device provides aerosol can for testing both residential or commercial smoke detectors, ensuring that they are always working efficiently and effectively. With its compact design measuring 5.2/5 inches by 2 inches, this smoke detector tester is easy to store and take with you wherever you go. Don't wait until it's too late to check your smoke detectors; keep a smoke detector tester on hand and give yourself the peace of mind that comes with knowing you are fully prepared for any emergency. Order yours today from a Veteran-owned business and get free shipping!