ViewSonic TD2420 24 Inch 1080p Dual-Point Optical Touch Screen Monitor with HDMI DVI-D and VGA 24" (23.6" viewable) Multi-touch LED monitor, Up to 50% energy-saving with LED backlight, 1920x1080 Full HD resolution,Dual Optical Touch with 7H hardness, HDMI, DVI, VGA input options, 20,000,000:1 MEGA Dynamic Contrast Ratio, Stereo speakers with SRS Premium Sound, ENERGY STAR and EPEAT Silver-certified