Our system can memorize your favourite sitting or standing height with four programmable memory presets. When you adjust the desk to your preferable height, it will lock the desk to that height without any changing. And it will also protect your assets and itself by bouncing back against any obstacle while lifting. It's a human friendly operation design to satisfy all our customer's need. ONEX GDE1200SH electric height adjustable stand up desk is made of environmental friendly material, which is good for your breath and health. ONEX takes part in the social responsibility of environment protection by adopting eco-friendly material in production. Its formaldehyde emission is much lower than the international standard, 1.5MG/L. Our electric stand up desk is also waterproof, stain resistant, and easy to clean up.