Bluetooth TechnologyBluetooth is a radio frequency (RF) specification for short-range, point-to-point, and point-to-multipoint voice and data transfer. Bluetooth will allow users to connect to a wide range of computing and telecommunications devices without the need for proprietary cables which are often not easy to use. A global specification for wireless connectivity: Bluetooth, named after the first Christian king of Denmark and It is not a serious dental problem, is the name of a technology specification for low-cost, low-cost radio links. short range between PCs, handheld computers, mobile phones and other computing and electronic devices. The Bluetooth SIG (Special Interest Group) is an industry group comprised of leaders in the telecommunications and computing industries who drive the development of the technology and commercialize it. More than 2,000 companies have signed the Bluetooth Adoption Agreement and are members of the Bluetooth SIG. Technical characteristics: Note: a piconet is a set of devices connected via Bluetooth technology in an ad hoc manner. A piconet starts with two connected devices, such as a laptop and a cell phone, and can grow to eight connected devices. All Bluetooth devices are peer units and have identical implementations. However, when establishing a piconet, one unit will act as master and the other(s) as slave(s) for the duration of the piconet connection. Bluetooth technology provides a 10 meter personal bubble that supports simultaneous voice and data transmission for multiple devices. Up to 8 data devices can be connected in a piconet, and up to 10 piconets can exist within the 10 meter bubble. Each piconet supports up to 3 simultaneous full duplex voice devices (CVSD). The raw data rate is 1 Mbps, but the actual data rates are 432 Kbps for full duplex transmission, 721/56 Kbps for asymmetric transmission, and 384 Kbps for TMS2000 transmission. A time division duplexing scheme is used for full duplex transmission. Bluetooth uses a frequency hopping spread spectrum technique. The spectrum is spread by frequency hopping up to 1,600 hops per second over 79 channels between 2.402 GHz and 2.480 GHz. Bluetooth radio modules avoid interference from other signals by switching to a new frequency after transmitting or receiving a data packet. The sophisticated transmission mode adopted in the Bluetooth specification guarantees protection against interference and seeks to ensure data security. Bluetooth operates in the 2.4 GHz range called the Instrumentation, Scientific, and Medical (ISM) band. This band offers license-free operation in the United States, Europe, Japan and most industrialized countries around the world..