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1. Product Name: Smoke Detectors Fire Alarm 2. Product description: 1> Photoelectric smoke detector detectors referred to, is the use of smoke particles in infrared light refraction fire detection principle, the circuit consists of infrared-emitting portion and receiving parts, the launch tube and receiving tube placed in the optical maze, optical maze maskable external stray light interference, but does not affect the smoke into the Under 2> smoking status, receiving tube receives only a very weak infrared light, when smoke enters, due to scattering, the received optical signal enhancement, when the smoke reaches a certain density, the detector output alarm signal 3> Unique design and optical signal processing technology, with dust, pest control, pit external interference function, to ensure the stability of the product from the design 3. Features: 1> manual testing, automatic reset 2> LED alarm indication, environmental adaptability 3> SMT manufacturing process, stability