Bluetooth is a short-range wireless communications technology that devices can use to exchange information over a distance of about 8 meters. The most common Bluetooth devices are headphones for making calls or listening to music, hands-free kits for cars, and other portable devices, including laptops and cell phones.

There are several Bluetooth profiles that define the features and communications standards for Bluetooth devices. For a list of the profiles supported by your phone, refer to your phone’s owner’s guide.

To connect to a Bluetooth device, you must turn on your phone’s Bluetooth radio. The first time you use a new device with your phone, you must “pair” them, so that they know how to connect securely to each other. After that, you can simply connect to a paired device.

Turn off Bluetooth when you’re not using it, to extend the life of your battery between charges. You may also be required to turn Bluetooth off in some locations. Bluetooth is turned off in Airplane mode.

Google Android 2.2 User’s Guide