The Caliber RMD030BT is a versatile 4 x 55W car stereo with USB, SD, AUX, and Bluetooth connectivity, allowing you to enjoy your favorite music from various sources. It features a built-in microphone for hands-free calling, enabling you to stay connected while driving safely. With its RDS capabilities, you can easily tune into your preferred FM radio stations and utilize features like AF, TA, and EON for enhanced radio experiences.