Power adapters are divided into wall-mounted power adapters
and wall plug in adapters.
The wall-mounted plug adapter can be explained simply. Wall-mounted plug adapter is a plug adapter that the body can be directly plugged into the plugboard. Desktop plug adapter is a plug adapter that the body needs to be placed on the desktop. The difference between desktop plug adapter and wall-mounted plug adapter is that desktop plug adapter needs AC cable to connect with city power.
The wall-mounted power adapter is usually used below 36W. This plug adapter is characterized by no need of AC wire, which saves cost and space, and does not need the space for the table goods to place the plug. It's directly plugged into the plugboard. It's also safer. A few plug adapters below 36W are desktop. This is usually due to the fact that the product is far away from the AC plug board or because the plug adapter is larger and heavier, or the plug adapter has heavier hanging weight. For example, multi-port USB plug adapter, in order to avoid the use of the above plug-in USB products and lead to insertion instability. Plug adapters larger than 36W are not suitable for wall mounting. Because of its large volume and weight, desktop is generally used for over 36W.