FAQ FAQ Select Product Altizen Pro Altizen Active QUICK LINKS What are Altizen sit-stand converters? Altizen sit-stand desk converters transforms your existing fixed-height desks into adjustable-height adjustable ones. What is the maximum size of my monitor / monitors / laptop? The single monitor and dual monitor modules can fit screens up to 27 inch screens. The laptop module can fit laptops up to 17 inch. How heavy can my monitor / monitors / laptop be? Whether you are using a basic unit, single monitor, dual monitors or laptop modules, the maximum combined weight of your screens is 15kg.