Caliber PMT550BT is a Bluetooth car kit that allows you to connect your Bluetooth-enabled phone and play music, make and receive calls, and even control some functions using voice commands. It has a built-in microphone for clear communication, a large LCD display for easy viewing, and supports various audio inputs, including USB, SD card, and AUX. With its full-duplex communication and DSP technology, you can enjoy high-quality, echo-free calls and music streaming.