Pro Very small
It's amazing how compact the earbud and portable charger both are. The diameter of the earpiece and charger are both considerably smaller than a dime. The earpiece itself is about the same size as regular wired earbuds, which is amazing considering that it has a battery and charging elements tucked away inside.
Pro Wireless charging
The earbud magnetically connects to the portable charger and charges wirelessly. This keeps the design of the Rowkin Mini nice and clean, and also is convenient because you don't need to use a cable. The portable charger itself can hold enough juice to top up the earbud 4 times before needing to be recharged itself, which of course needs to be plugged in.