This is M2 series super-led light heads from " Whelen Engineering " is designed to stand up to the harsh environments and standards of the industry while providing top of the line performance. Has Mounting screws are located outside of the sealed lens/reflector assembly eliminating water infiltration. Updated design allows for faster and easier installation. This wide-angle model to accommodate several uses can be mounted vertically or horizontally and has 25 flash patterns and split-color.