What is Bluetooth? Short range digital wireless system that can dynamically find and setup connections with nearby devices.

- Piconets and Scatternets - Piconets are very small networks that can have up to 8 active devices. When multiple Piconets are connected to each other, they are called Scatternets.
- Data Rates and Link Types - The typical connection speed for Bluetooth devices is a few hundred kilobits per second which is more than enough for most non-media applications (such as remote controls).

- Frequency Hopping (FHHS) - The Bluetooth system uses a relatively simple frequency hopping radio transmission system to save battery power.
- Interference Avoidance - The frequency hopping patterns can be changed to avoid interference to and from nearby devices.

- Enhanced Data Rate - EDR - The Bluetooth has evolved to allow to include EDR for use devices that can communicate at 3 Mbps.

- Device Discovery and Connection - Bluetooth devices can use a pre-defined hopping pattern to find nearby devices. Once the Bluetooth device has found and obtained the address of a nearby device, it can change its hopping pattern to match the device so it can connect to it.

- Pairing and Privacy - To maintain security, Bluetooth devices can use keys to verify the identify of other devices and to modify data (encrypt) to make the data private.

Protocol Layers - The Bluetooth system has been divided into functional protocol layers.

Bluetooth Protocols - Bluetooth protocols are commands and processes that enable the Bluetooth system to coordinate transmission and transfer user data.

Bluetooth Profiles - Profiles are the protocols, processes, and values that are defined for use by specific applications and services.