Definition - What is Bluetooth 2.0+EDR

Bluetooth 2.0+EDR and Bluetooth 2.1+EDR are specifications for short-range wireless data exchange. Both Version 2.0 and 2.1 support EDR (Enhanced Data Rate), a faster PSK modulation scheme capable of transmitting data 2 or 3 times faster than previous versions of Bluetooth. 

Version 2.1+EDR is built to be more secure and make man-in-the-middle (eavesdropping) attacks more difficult. Connecting, which is called "pairing" is easier than in previous versions. In version 2, a Bluetooth device will make a connection automatically and all the end user has to do is confirm the connection.  Version 2 also allows multiple Bluetooth connections at the same time. 

A feature called Sniff Subrating extends battery life by reducing the active duty cycle of Bluetooth devices like keyboards and mice to improve battery life. Bluetooth hosts can specify maximum transmit and receive latencies so that low-power devices can know how often they must exit and re-enter "sniff mode." This can result in up to five times the battery life experienced by older low-power Bluetooth devices.

Specifications	Bluetooth 1.0	Bluetooth 1.2	Bluetooth 2.0+EDR (enhanced data rate)	Bluetooth 2.1+EDR (enhanced data rate)	Bluetooth 3.0 HS (high speed)
Transmission rate	721 kbit/s	721 kbit/s	2.1 Mbits/s	3 Mbits/s	24 Mbit/s
Adopted	2002	2005	2004	2007	2009
Backward compatible		yes	yes	yes	yes
Simple Secure Pairing		yes	yes	yes	yes
Near Field Communication				yes	yes
Sniff Subrating				yes	yes
802.11 Protocol Adaptation Layer (PAL)					yes
Standard PAN range			10 meters (33 feet)	10 meters (33 feet)	10 meters (33 feet)

You can find the complete Bluetooth specifications listed here.

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Bluetooth 2.0+EDR is a common specification for laptop computers. 

04 Mar 2010