2013 Toyota Highlander Owners Manual - Page 723

3-5. Using the rear audio system Ejecting a disc Press and remove the disc. Headphone jacks To use the headphones, connect them to the jack. To adjust the volume Right side dial: Turn it toward the front of the vehicle to increase the volume. Turn it toward the rear of the vehicle to decrease the volume. Left side dial: Turn it toward the rear of the vehicle to increase the volume. Turn it toward the front of the vehicle to decrease the volume. 408