A USB hub is an expander for USB device interfaces, meaning that after connecting one of the computer's USB ports, it can expand to provide multiple USB ports for more devices with this type of interface to connect.

Parameter: IPAD/IPHONE/OTHER mobile phones
Suitable for: IPAD1, IPAD2, IPHONE 2G, 3G, 3GS, 4G, 4S, IPOD TOUCH1, TOUCH2, TOUCH3, NANO3, NANO4, NANO5, MP3, MP4, HTC phones, NOKIA phones, Samsung phones, GPS, and so on.

Two USB port car charger adapters, you can charge two USB devices simultaneously in your car.
Charge any USB device (such as digital cameras, PDAs, mobile phones, USB accessories, and more) with your car!
Suitable for electronic appliances using USB power cables.
Especially suitable for Apple iPad, iPad2, New iPad, iPhone 3GS, and iPhone 4S.
Input: 12-24V DC.
Total USB Output: DC 5V 2.1A + 5V 1A.