The Spigen Dual Port USB Car Charger is extremely compact and not much bigger than the plug it goes into. It came packaged in a cardboard box with an outside sleeve on it. It is rated to charge at 2.4A from both ports. It is advertised as a quick charger, which it is, but should not be mistaken as Qualcomms Quick Charge which is much faster.
The charger is simple to use, just plug it in your car and then plug your device in. There is an LED indicator above the ports to let you know if it is working. Throughout my testing the charger had no problem charging at its rated amperage.
Because of its compact size, high amperage abilities, and good build quality, I highly recommend this charger.
If you are interested in purchasing this charger it can be found here.