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, the KBD-S2S-27F 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. 27F keyboard tray provides plenty of room for keyboard & mouse.