This is a complete kit to fit to your car and gives two USB A sockets providing power to two devices.
Specification:
Input: DC 7-20V
Output: DC 5V 3A, 15W
Size: 46x27x14mm
Contents:
1 x USB Step Down Voltage Power Supply Output Adapter.
1 x Piggy Back MINI Blade fuse holder.
1 x Earth wire with ring terminal.
2 x Heat shrink tubes.