Ergonomic Height Adjustment: Designed with 2 rotating knobs, the ergonomic stand up desk allows you to switch from sitting mode to standing mode for a healthier working life. The upper desktop can be raised and lowered from 28.5 to 49.5, while the lower desktop can be lifted up and down in the range of 28.5 -46. Spacious Work Area: The standing desk features 2 individual platforms to fulfill your different requirements. Measuring 27.5 x 24, the wide desktop is large enough to accommodate your laptop and office supplies. The front desktop is easy to tilt for comfortable view. More, there is a baffle on the titling desktop to avoid falling and protect items.