There are keyboard arms and trays that can be adjusted for sitting and standing height or just seated height.
Most of the articulating arms work with trays discussed here are combo units (manufacturers also refer to these as “adjustable arms” and “platforms”). The arms adjust with spring assisted adjustment mechanisms instead of knobs that can bump your knees. Sometimes there is a choice of arm track length and what you order depends on the depth of the desk it will be installed on. All of the arms have positive/negative tilt mechanism. Negative tilt is highly recommended by ergonomists.
A word about the sit stand concept…
Just the simple movement towards standing throughout the day increases respiration and energizes the body. Standing at intervals throughout the day creates opportunities to stretch and help maintain the back’s natural curvature. Given the opportunity, an employee with change from sitting to standing posture several times a day.
It is easier to stretch and move in a standing posture, an important part of a healthy body and overall comfort. Plus, reaction alertness is improved and this can leading to increased productivity.
The Best of the Best section features sit-stand arms and keyboard trays systems as well as advanced systems for seated positions.