Pro Plenty of ear attachments
More than just different sized caps are included - you get two different styles of caps in multiple sizes. In addition, there are removable clear plastic clips that clip onto the earbuds to help keep them in your ear. These clips also come in different sizes, and are ideal when working out or moving around often when regular earbuds would have a hard time staying in your ear.
Pro Can be used as stereo earbuds
Included is an attachment that has a wire and an additional earbud. Plug the wire into the primary (larger) earbud, and you effectively have stereo bluetooth earbuds. It's your choice if you prefer to use the single earbud, or the pair (although the single earbud will provide longer battery life).