The MEX-BT5000 car audio head unit is designed for the truly mobile lifestyle. The first Sony head unit with Bluetooth® wireless technology, it automatically links to any Bluetooth® mobile phone and provides handsfree calls with crystal clear sound. Phone book data from the handset also appears on the BT5000’s high-visibility screen, so you can make and receive calls during a journey without even taking your phone out of your pocket. Support for the Bluetooth® OPP (Object Push Protocol) also allows the wireless transfer of up to fifty phone book contacts to the head unit itself.