Combat the negative effects of sitting for very long with this particular sit stand height adjustable table riser. The ergonomic monitor wedge features a keyboard tray and a height lock feature that make it easy to sit or stand freely while you work. Ergonomic monitor platform allows you to sit or stand while you work. Good work surface area accommodates a monitor or laptop. Dual-lever height adjustment makes it easy to raise or lower the platform to your preferred height. Fixed, ergonomic keyboard tray provides room for your peripheral. Rubber grip pads prevent sliding and protect the desktop area of yours. Assembly required.