Bluetooth wireless technology is finally here. This universal radio interface enables portable electronic devices to connect and communicate wirelessly via short-range, ad hoc networks. Originally designed to replace cables for interconnecting devices such as printers, keyboards, and mice, its perceived potential has evolved into far more sophisticated usage models. This seminar presents and explains the different components of the Bluetooth architecture and profiles. Adhoc networks, Piconets and Scatternets will be explained. The Bluetooth architecture protocols , Bluetooth security and the Bluetooth Profiles will be described in details. An overview of competing technologies such Wifi, Zigbee and Ultra Wide Band will presented to conclude the seminar.