2007 Toyota Prius Owners Manual - Page 217

D Automatic volume settings for high speed You can set the volume one step up when the vehicle speed is over 80 km/h (50 mph). (When it is under 70 km/h (44 mph), previous volume is back.) Each time you touch the "Adaptive Volume Control" switch, you can switch on or off. 27p239 27p240 (c) Setting the volume 1. Touch the "Volume" switch to display the "Volume Setting" screen. 2. Touch the "−" or "+" switch to adjust the "Voice Volume" or "Ring Volume". Voice Volume . . adjusting the party's voice. other Ring Volume ...adjusting the ring volume. 200