SIT-STAND DESK CONVERTER - The health problems associated with sitting all day is well-known. You don't need to spend over $500 to buy a brand new standing desk to be healthier. This converter works with your existing desk to transition to standing at the office. EASY and QUICK TRANSITION - Go from sitting to standing in one easy smooth motion. Spring lift mechanism assists with the lifting motion, even with your computer and monitor on it. The sit-stand desk goes from 6.25 inch high to 16.5" inch high. BONUS DUAL MONITOR MOUNT - Most sit stand converter buyers end up buying a monitor mount also. We included a full motion dual monitor stand to save you from the headache of searching for a compatible model. LARGE DESKTOP and KEYBOARD TRAY - The top surface measures 36" x 22.5" providing plenty of space for single monitor, dual monitor, and laptop + monitor setups. Ergonomic keyboard tray keeps staggered height between keyboard and monitor to prevent neck strain without manual adjustments of sitting or standing. The tray is large enough to keep keyboard and mouse side by side and raises and lowers with the top surface. NO ASSEMBLY REQUIRED - Use your desk right out of the box! Place on your existing desk and start organizing your workstation