Create Instant Active Standing - VIVO's desk riser provides on-demand standing throughout the day for the freedom to get out of your chair and relieve muscle tension, reduce stress, and increase productivity. --Patented-- Space Efficient 80 cm Surface - The top surface measures 80 cm x 40.1 cm, which maximizes space while still providing room for dual monitors. The 66 cm x 26.1 cm keyboard tray raises in sync with the top surface to create a comfortable workstation. Strong 15 kg Lift Assist - Go from sitting to standing in one smooth motion using the innovative simple touch height locking mechanism with pneumatic spring lift (Adjustment Range: 11.2 cm to 49.8 cm). Lift design elevates straight upwards. Very Minimal Assembly - This riser is almost ready to go right out of the box! Place on your existing desk, attach the keyboard tray, and start organizing your workstation. We've Got You Covered - Sturdy, high-grade steel design is backed with a 3 Year Manufacturer Warranty and friendly tech support to help with any questions or concerns.