BLUETOOTH

Blue tooth is the one which is used to transfer data between wireless device.It is a wireless technology used today for connecting and transferring information between devices such as mobile phones, laptops, PCs, PDAs, printers, digital cameras, mice and keyboards.

As different devices use different cables and plugs to connect to other devices, but in Bluetooth the informations can be send from one device to another device without any cable. But both the device should have the bluetooth facilities so that the datas can be send from it. -- most phones have a unique. Bluetooth defines wireless standards that allow data to be transferred between such devices securely, easily and, of course, free of cables.

In the wireless world, home Wi-Fi networks and wireless hotspots are almost 20 times faster. With the latest of Bluetooth (version 2.0), devices must be within about 15 metres of each other to connect, and achieve data transfer speeds up to 2 or 3Mbps (megabits per second) -- real world experiences are usually half of this. Expect an average-length song to transfer from a Bluetooth-capable laptop to a phone with Bluetooth in a minute; pictures or ring tones take about 10 seconds.

Although different products support different standards of Bluetooth (version 1.0, 1.1, 2.0), they are backwards compatible -- a Bluetooth 2.0 phone will connect to a Bluetooth 1.0 hands-free headset, for example. Confusing matters further, there are different that a device must support if it is to work as intended.

Say you want to stream music from your phone to a pair of Bluetooth stereo headphones. In this case, both devices must support the Advanced Audio Distribution Profile (A2DP). For car kits, you'll need the Hands-Free Profile (HFP); Bluetooth mice, keyboards and joysticks utilise the Human Interface Device Profile (HID). Before buying a Bluetooth device, check to see that it supports all the profiles you need.

Although Bluetooth has already become a standard inclusion on most mobile phones, laptops and PDAs, expect to see many more devices around the home adopt the technology once the next generation of the standard is finalised by the Bluetooth Special Interest Group, a specialised industry body that oversees Bluetooth development.

This new version of Bluetooth, , will meet the high-speed demands of transferring large amounts of data, and is expected to enable high-quality video and audio applications for portable devices, projectors, TVs and wireless VoIP.

And for those wondering why on earth it's called Bluetooth, here is the reasoning on