The OEM MZD-Connect integrated USB ports unfortunately do not supply enough power to charge phones or tablets. This fast charger adapter merges the power of both USB ports to become a single high power port resulting in a 200% - 300% increase in charging capacity.
Charges smart phones at up to 1.50A compared to the 0.45A of stock USB ports (0.45A in most cases is not even enough to charge your phone). This boost also enables iPad® and other tablet charging.
While charging you will retain the capability of USB data communication with MZD Connect, so that you can still listen to music from your phone while charging.
Note: The use of high quality USB cables is required to enable full speed device charging. Using a damaged, worn-out cable could result in lower charging speeds.
Just OK... 
