Best Seller | SDI M8 Smoke Detector Tester,10 in. L x 9 in. W Smoke Detector Tester, Battery Size Not Applicable, Features Fast Detector Activation, Silicone-Free Testing, Includes Not Applicable, Product Type Smoke Detector Tester, Container Size 2.6 oz, For Use With Commercial Detectors, Residential Detectors,... ... more SDI M8 Smoke Detector Tester,10 in. L x 9 in. W Smoke Detector Tester, Battery Size Not Applicable, Features Fast Detector Activation, Silicone-Free Testing, Includes Not Applicable, Product Type Smoke Detector Tester, Container Size 2.6 oz, For Use With Commercial Detectors, Residential Detectors,... | | $12.99 go to store |