Using this power supply is easy. First, make sure to use the right plug adapter or cable for your power source (110V or 220V). Then, connect the output to a 2.1mm DC plug of your device. You'll see the green LED indicator lamp light up when it's working. For those using it to power 5V LED strips or motors in a CNC project, just connect them properly and enjoy a stable power supply. Note that this power supply comes with a US plug. If you're in a different country, use an appropriate adapter. Keep it in a dry and cool place to ensure its performance. Regularly check the cables for any signs of damage and replace them if necessary.