Max. fan airflow
The maximum airflow that a cooling fan can create; measured in CFM — cubic feet per minute.
The higher the CFM number, the more efficient the fan.
USB А
Number of USB ports provided in the stand's design. For more details, see "Additional —
USB Hub".
The more such ports the stand provides, the more peripheral devices can be simultaneously connected through it to the laptop. At the same time, it's worth considering that all the hub ports are powered by a single USB connector on the laptop and share the USB power equally. Thus, for "power-hungry" peripherals (like external hard drives without a separate power supply), there might not be enough power when connected through a hub with
3 – 4 ports.
Folded size
Dimensions of the stand when folded. First of all, the convenience of transportation depends on this: if you plan to carry the product along with a laptop, you should pay attention to ensuring that the bag (case, backpack ...) has the right amount of space.
Note that the height of many models in the folded state is rather small, so manufacturers may not indicate it in the characteristics, limited only by the length and width.
Table top/platform size
The size of the surface intended for the direct placement of a laptop. This parameter allows you to fairly accurately assess how the stand is suitable for your device — after all, even laptops with the same diagonal can vary slightly in length / width.
