QSLQYB

Carbon monoxide detectors; Combustible gas concentration detectors; Device for testing the function and effectiveness of smoke detectors, carbon monoxide detectors and heat detectors featuring an aerosol spray; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Fire and smoke detectors; Gas detectors for detecting the presence of gas; Smoke detectors