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Contrast Ratio: 2,000:1 to 2,900:1
https://www.dell.com/us/en/k-12/peripherals/projector-dell-s500/pd.aspx?c=us&l=en&refid=projector-dell-s500&s=k12
https://www.necdisplay.com/p/multimedia-projectors/np-u300x
https://www.dukane.com/av/products/Item_dvProjectors.asp?Model=8105H