Pioneer DEH-P6000UB In-Dash CD/Mp3/Wma/iTunes AAC/Wav Receiver Use the available CD-BTB200 Bluetooth Adapter and Bluetooth-enabled cellular phones for easy, safe, and hands-free operation, including talking via the headunit's microphone and your vehicle's speaker system. The system automatically mutes any other audio during incoming or outgoing calls. Optional CD-BTB200 adapter required XM and Dirius require subscription and antenna 3 RCA Hi-Volt preouts for adding on external amps and speakers simplify system expansion. Two-Way Crossover with separate High and Low Pass settings. Built-in MOSFET 50 W x 4 amplifier for excellent sound quality, minimal distortion and efficient power handling.