100% waterproof plastic loudspeaker(IP-67). For use in critical areas with high humidity or with extreme requirements of cleaning (high-pressure cleaner). Resistant to solvents and cleaning agents. Can be installed on the surface, with a bracket or can be flush-mounted. Fraunhofer certificate DN 2003-1165, according to ISO 14644-1, -14 air purity class 1. Fraunhofer certificate DN 2111-1277, according to ISO-4628-1 and VDI 2083 §17. Excellent 15% hydrogen peroxide resistance. Applications: pharmaceutical industry, laboratories, clinics, food industry, semiconductor industry, aerospace.