The Oakley sunglasses are almost normal size for the amount of electronics packed into them. Most of the circuitry are cleverly hidden in the two arms. There are no exposed wires anywhere.
Although these glasses are a little bulky, they are surprisingly well balanced and do not feel heavy or arkward on the face. The ear buds are mounted on a three-jointed arm and can be precisely positioned to fit the wearer's ear.
We found these ear buds were much more comfortable to wear compared to the Plantronics units. It is also possible to fold the earbuds completely out of the way.
The controls are located on the top of the glasses. We would have preferred them to be on the side, but we space considerations may have had a lot to do with the placement decisions.
The main reason is pushing on the side of the glasses is a little steadier than pushing from the top. Actually, it is difficult to actually "push" from the top. The way we found best was to press the button but have the thumb underneath for support...more of a "squeeze" than a "press".
The volume control buttons (up/down, phone) are on the left arm. The MP3 player control (FF, RW, Play/Pause) button are on the right. A microphone is also built into the arm of the glasses...see if you can spot in the photos.
As we have stated previously, we would have preferred if the buttons were placed on the side of the frame. If we had the choice to move just one button, we would move the "answer phone" button to the side...maybe by pressing the "O"? Answering the phone is such a different activity that there should be a clear and easy to remember location for it...not the middle button on the left side.
The glasses have an internal rechargeable battery "somewhere". The battery is charged via the cleverly integrated USB port on the right side. We like the use of the USB port. It means one less charger we have to bring with us on the road.
Since the O ROKR are also a pair of sunglasses, they bring with them all of Oakley's expertise in this area. The lens are interchangeable (extra lens are not included) and offers 100% protection against UVA, UVB, UVC.