Bluetooth subsystem supportCONFIG_BLUEZ  Bluetooth is low-cost, low-power, short-range wireless technology.  It was designed as a replacement for cables and other short-range  technologies like IrDA.  Bluetooth operates in personal area range  that typically extends up to 10 meters.  More information about  Bluetooth can be found at <http://www.bluetooth.com/>.  Linux Bluetooth subsystem consist of several layers:               BlueZ Core (HCI device and connection manager, scheduler)               HCI Device drivers (interface to the hardware)               L2CAP Module (L2CAP protocol)               SCO Module (SCO links)  Say Y here to enable Linux Bluetooth support and to build BlueZ Core  layer.  To use Linux Bluetooth subsystem, you will need several user-space  utilities like hciconfig and hcid.  These utilities and updates to  Bluetooth kernel modules are provided in the BlueZ package.  For more information, see <http://bluez.sourceforge.net/>.  If you want to compile BlueZ Core as module (bluez.o) say M here.L2CAP protocol supportCONFIG_BLUEZ_L2CAP  L2CAP (Logical Link Control and Adaptation Protocol) provides  connection oriented and connection-less data transport.  L2CAP  support is required for most Bluetooth applications.  Say Y here to compile L2CAP support into the kernel or say M to  compile it as module (l2cap.o).SCO links supportCONFIG_BLUEZ_SCO  SCO link provides voice transport over Bluetooth. SCO support is  required for voice applications like Headset and Audio.  Say Y here to compile SCO support into the kernel or say M to  compile it as module (sco.o).HCI UART driverCONFIG_BLUEZ_HCIUART  Bluetooth HCI UART driver.  This driver is required if you want to use Bluetooth devices with  serial port interface. You will also need this driver if you have   UART based Bluetooth PCMCIA and CF devices like Xircom Credit Card   adapter and BrainBoxes Bluetooth PC Card.  Say Y here to compile support for Bluetooth UART devices into the  kernel or say M to compile it as module (hci_uart.o).HCI UART (H4) protocol support CONFIG_BLUEZ_HCIUART_H4  UART (H4) is serial protocol for communication between Bluetooth   device and host. This protocol is required for most UART based   Bluetooth device (including PCMCIA and CF).   Say Y here to compile support for HCI UART (H4) protocol.HCI USB driverCONFIG_BLUEZ_HCIUSB  Bluetooth HCI USB driver.  This driver is required if you want to use Bluetooth devices with  USB interface.  Say Y here to compile support for Bluetooth USB devices into the  kernel or say M to compile it as module (hci_usb.o).HCI VHCI virtual HCI device driverCONFIG_BLUEZ_HCIVHCI  Bluetooth Virtual HCI device driver.  This driver is required if you want to use HCI Emulation software.  Say Y here to compile support for virtual HCI devices into the  kernel or say M to compile it as module (hci_vhci.o).