Brand: Pioneer
The Pioneer 3121 is a car audio receiver that was introduced by the Pioneer Corporation in the early 2000s. This model is part of the Avex series and falls under the CD receiver category. The 3121 comes with a CD and MP3 player, FM/AM tuner, and USB connectivity for playback of music files from external storage devices. It also features a 2.5D rotary volume knob, a large LCD display, steering wheel controls, and variable illumination for the buttons and display.