https://www.china.cn/product-detail/TSCT-2504-cheap-professional-plastic-trumpet_60549563221.html

1.      Aluminumhorn and case ;dia-cast

  aluminum  throat 

2.      steel or stainless steel bracket  for easy 

    mounting 

3.      50W 16ohm or can install 70/100V audio 

    transformer inside for high voltage input 

4.      it can be used in indoor and outdoor  , 

    IP65 weatherproof 

5.      adjust speaker angle by loosing the screw 

    on the bracket