High Quality Housing: The housing is made of high quality ABS material and steel. The material is hard, it is not easy to deform, the is painted, it is anticorrosive and anticorrosive and it is Sound Amplification: The wide sound reinforcement outputs, heat dissipation and amplification are combined into one. It can dissipate heat well and expand the sound to make the sound further. Motor: Excellent quality and excellent craftsmanship combined with a high quality pure copper motor, it is not easy to generate heat and damage, stable and long service life. Multi-wing Impeller: multi-wing impeller, which uses wind mechanics technology, strict dynamic balance calibration, to convert wind energy into sound energy, can improve sound quality. Scope of Application: electric hoods are suitable for places where natural disasters such as shopping centers, mines, factories, airports, substations, etc. They require security warnings., Weight: 0.8377565956 Pounds, Manufacturer: Sonew