Essential performance features & all-in-one functionality in an elegant, Energy Star qualified design that offers enhanced energy efficiency over its predecessor to help you save money. The HP LE1901wi monitor boasts 50% reduction in mercury over previous generation models, elimination of BFR, PVC, & arsenic from the panel & st&, & minimized power consumption. 19 inch Active Matrix TFT (thin film transistor) Contrast Ratio: 1000:1 Pixel Pitch: 0.2835 mm Response time: 5 ms Anti-Glare Energy Star compliant