An AC 5V 2A power adapter is a specific type of power supply designed to provide a stable 5-volt direct current (DC) output with a current capacity of 2 amperes (2A). This type of power adapter is commonly used to power a variety of electronic devices such as routers, modems, LED strips, small electronics, and other low-power gadgets.
Here's what the specifications mean:
Voltage (V): The adapter provides a constant 5V output. Devices that require a 5V power supply can be powered using this adapter.