Clarion M101RXCRET 24-Foot Marine Remote Extension Cable Built-in Bluetooth Interface - Connect with various devices such as mobile phones, PDAs and MP3 Players via the CZ500's built-in wireless Bluetooth interface. Supports popular Bluetooth profiles such as A2DP/AVRCP for audio streaming &amp; HSP/HFP for hands-free operation. A wired microphone is also supplied for a clear hands-free conversation. CD/MP3/WMA Compatible - In addition to store-bought music CDs, you can also enjoy listening to tunes that you've burned to a CD on a personal computer. The most common formats, MP3 and WMA, are supported. Superior iPod and iPhone Connectivity - Just connect the USB cable to get direct and complete control of your iPod. Additionally, the head unit has been designed to connect to iPhone and has been certified as Works with iPhone to integrate its communication and entertainment capabilities into your car system. Rear USB for Cable-linked MP3/WMA Playback -The USB input on the rear of the unit can be used to connect a USB memory stick that contains MP3 and WMA music files. AM/FM Radio - Enjoy your favorite programming on the AM/FM tuner, complete with 18 FM and six AM presets for quick access.