Longhornis a major manufacturer of alarm siren, based in China. We offer various types ofproducts such as alarm siren, magnetic door detector, alarm indicator and so on.Our products are high quality and competitively priced. Our full chain ofmanufacturing passive infrared detector, fire alarm detector can be completedin China,even in one city. Our lower manufacturing cost can save your purchasing cost. Amore detailed description of our product is shown on the page.