Using the AerPro Car Charger is easy. First, plug the charger into your car's 12V or 24V lighter socket. Then, connect your smartphone with a Micro USB charging socket to the charger using the curly cord. If you have a USB - C phone, use one of the listed adaptors to connect it to the charger. When using, make sure the input voltage of your car falls within the 12.0 - 24.0 Volts range. Avoid using the charger in extremely hot or cold environments. After each use, gently unplug the charger from the socket and store it in a dry place. Regularly check the cord for any signs of damage. If you notice any issues, stop using the charger immediately and contact customer service.