COROLLA uses dedicated audio systems for each model grade, plus the option of satellite navigation (as pictured here) on Ultima as a factory option. When sat-nav is specified, the controls are incorporated into the main AXV (audio-visual with external navigation processor) head unit and use a combination of buttons and knobs around the main screen and touch-screen controls. The standard Ultima stereo unit is a three-in-one (AM/FM radio, cassette, CD) system with a six-CD in-dash multi-changer. There are four main speakers and two front tweeters.