Height adjustment range optimized to enable sit-to-stand use of a fixed-height desk when paired with Chief’s K1-series dynamic monitor arms, KBD-S2S-19C provides easy placement of the keyboard and mouse for better ergonomic support. S2S keyboard arm provides easy height adjustment range from 7” (178 mm) above to 5.5” (140 mm) below the work surface to meet the natural typing height of a user whether sitting or standing at the workspace. 19C keyboard clamp tray securely clamps most keyboards and provides optimal ergonomic positioning of mouse tray.