Using this AerPro car accessory socket adapter is a breeze. First, find a 12V or 24V accessory socket in your car. Plug the adapter into it. You can then connect your smartphones, iPads™, or tablets to either the three power sockets or the USB - A charge port. When connecting your devices, make sure the power requirements of your device are within the capacity of the socket or port. Each individual socket can handle a maximum of 5 amps, and the USB - A port has a total output of 2.4 amps. As for maintenance, keep the adapter clean. You can use a dry cloth to wipe it down occasionally. Avoid getting it wet or exposing it to extreme temperatures. If you notice any damage to the cable or sockets, stop using it immediately and contact the supplier. Enjoy your convenient charging experience with this adapter!