PSZoom series are with zoomable optics design, one item with narrow beam to wide beam angles that make it be able to be used for different applications that needs different beam angles, and customers just keep one item with one zoomable optics in stock is enough, no need to keep items with different beam angles lens.
PSZoom 8,18,25 are with 10 to 40 degrees zoomable angles.
PSZoom 12 is with 10 to 60 degrees zoomable angles.
3 years warranty as standard, 5 years as options.