"xrBlue" adapter is a integrated Bluetooth-FM adapter that plugs into a car cigarette lighter socket, enabling in-car cable-free hands-free Bluetooth for every kind of Bluetooth-enabled devices including cell phone, MP3 player, iPod, navigation system etc. The "xrBlue" adapter comprises of five components: Bluetooth module to automatically detect and establish communication with the Bluetooth enabled apparatus; FM module for configuring to tune to the car radio FM channel and play via the car stereo system; power module to plug-in the car cigarette lighter socket; optional power plug-in extension socket to provide the power pass-through for additional electronic device; optional retractable wired microphone or Bluetooth microphone. The "xrBlue" adapter differentiates from previous art in that: this unique integrated Bluetooth-FM design synergy communication, entertainment, and navigation into all-in-one Bluetooth solution; this device does not rely on out-of-date cassette tape player and is ready to use by simply starting the car with the device inserted into the car cigarette lighter socket; there is no worry of battery life since it is directly plug-in the cigarette lighter socket for constant supply of power.