The device's USB port (for charging and transferring content over an included cable) is on the bottom right edge, next to a headphone jack port that, annoyingly, doesn't accept standard mobile 3.5 mm jacks; you'll need to get a 2.5 mm adapter to use it with most types of headphones or headsets (the Cool - ER doesn't include earphones). (macworld.com)
The volume buttons are located on the bottom right edge of the device. (the-ebook-reader.com)
The bottom right edge of the Omega is rounded, this makes it easy for you to roll it to the right. (best-cat-art.com)