Dual USB Car Charger, Best Quality 3.1a Dual Cigarette Lighter Charging Adapter Socket w/ Car Power Charger - Blue High conversion efficiency: intelligent recognition Car (12V or 24V) power supply for charging 5V products. Such as cell phones, MP3 \ MP4, GP5, GPS, IPAD, Camera etc. Input DC 12-26V; output DC 5V 3.1A The flexible retractable wire extends up to three feet long. Car Charger head has two options: one, comes with voltage warning display. Second, the current head of the controllable switch car charger, easy to use Charging indicator is blue, the built-in intelligent identification chip, overheating, over-current, over voltage, short circuit, shielding and other functions.