The CS-154BS is the voice alarm certification product. The CS-154BS Wide range speaker features an ABS resin enclosure and stainless steel bracket for all weather durability. It is comprised of a high-efficiency weather-resistant horn and a high quality sound cone speaker. providing clear and highly directional sound reproduction. The CS-154BS is equipped with a constant directivity horn (90° horizontal) to control sound directivity. realizing uniform and clear sound dispersion over a wide area.