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USB Bluetooth dongle help!

I'm thinking of getting one of these, you can pick them up off eBay for around £6 delivered but are there any particular "industry standards" I need to be looking out for?

For example, the specs on one of these devices reads:

Bluetooth V1.2 Compliant
USB UHCI/OHCI spec 1.1 compliant
Operation range: 0-100M (Bluetooth class 1)
Built-in antenna
LED status indicator
Frequency band: 2.4GHZ unlicensed ISM band
Maximum data rate: 1MB
Sensitivity:-89dBM@0.1%BER

Bluetooth v1.2? Is that the latest standard?
USB spec 1.1? I assume that means USB 1.1?
Frequency band: is 2.4Ghz going to interfere with my wireless connection?

So many questions, so little time.............

Thanks for any advice :D
You'll always miss 100% of the shots you don't take - Wayne Gretzky

Any advice that you receive from me is worth exactly what you paid for it. Not a penny more or a penny less.
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