This music horn speaker is comprised of a high-efficiency weather-resistant horn and a high quality sound cone speaker, providing excellent speech and BGM clarity. It features ABS resin enclosure and stainless steel bracket for all weather durability. The CS-660BS-EB is certified to the European Standard EN 54-24: 2008 and International Standard ISO 7240-24: 2010, and is compliant with the British Standard BS 5839-8: 2008.