CNET has a review of the Cardo Scala 600 and writes - “On top of the headset is a small rocker wheel similar to that on the Scala 700. The wheel adjusts the volume, and the direction of the rocker’s up and down volume controls can be adjusted depending on which you side you prefer to wear the headset. As with the 700, the back of the headset has a contoured earpiece that rests against the ear and a flexible ear loop that can be configured to be worn on either side of your head. We had comfort issues with the earpiece, finding it a bit large for our ears.”

Read more about the Cardo Scala 600 Bluetooth headset