Using this power supply is easy. First, make sure the device you want to power can accept the voltage range of 3 - 12VDC. Then, select the appropriate voltage output on the power supply. Plug the power supply into a wall outlet using a suitable plug adapter if needed. Attach the correct tip to the power supply and connect it to your device. When using it, avoid overloading the power supply. Don't exceed the 1.5A output limit. To maintain it, keep it in a dry and cool place. If it gets dirty, use a dry cloth to gently wipe it. Don't use any liquid cleaners as they may damage the power supply.