Our flame-retardant USB car charger comes with two USB charging interfaces supporting total 3.1A output (single USB max. output is up to 3.1A) to ease your time by charging two electronic devices simultaneously. Equipped with smart chip, it can automatically identify and optimize the charging current to speed up charging time. And it can provide short circuiting, over-heating, over-currents, over-charging and other advanced protections to ensure the safety of your devices with its in-built intel