Borrowed generously from Wikipedia:
Bluetooth 2.0
This version is backwards compatible with 1.x. The main enhancement is the introduction of Enhanced Data Rate (EDR) of 3.0 Mbps. This has the following effects (Bluetooth SIG, 2004):
* 3 times faster transmission speed (up to 10 times in certain cases).
* 100 meter range
* Lower power consumption through a reduced duty cycle.
* Simplification of multi-link scenarios due to more available bandwidth.
* Further improved BER (bit error rate) performance.
So, in a nutshell, if you're wandering far afield from your Blackberry with your headset, you might get something more out of it. The fact the transmitter and receiver are used for fewer slot cycles may trim up your battery usage on both devices. Were it me, I'd probably find the best headset that meets my needs and worry about whether it's 2.0 or not later. Most headsets that are good quality units with decent chipsets are going to be 2.0 as a matter of consequence, so it might actually be hard to find one that ISN'T 2.0.
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957 => 5820 => 7280 => 7290 (UL) => 8820 (UL) => 9000 (UL/DB) => 9800
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