Asus. Power Consumption (1W (Standby)30W (Typical)) - Refresh Rate (Not Specified by Manufacturer) - Dynamic Contrast Ratio (10,000,000:1) - Size (21.5") - Connectivity (1 x 3.5 mmInput/Output1 x 3.5 mmOutput1 x DVI-D1 x HDMI1.31 x VGA) - Lock slot (Yes)