From another list the following in response to a question about the
frequency allocation for blue tooth protocol.  

The Air Interface & Frequency Band

The Bluetooth air interface is based on a nominal antenna power of 0dBm.
The air interface complies with the FCC rules for the ISM band at power
levels up to 0dBm. Spectrum spreading has been added to facilitate
optional operation at power levels up to 100 mW worldwide. Spectrum
spreading is accomplished by frequency hopping in 79 hops displaced by 1
MHz, starting at 2.402 GHz and stopping at 2.480 GHz. Due to local
regulations the bandwidth is reduced in Japan, France and Spain. An
internal software switch handles this. The maximum frequency hopping
rate is 1600 hops/s. The nominal link range is 10 centimeters to 10
meters, but can be extended to more than 100 meters by increasing the
transmit power. The Modulation is GFSK (Gaussian Frequency Shift Keying)
with a BT=0.5. The Modulation index must be between 0.28 and 0.35. A
binary one is represented by a positive frequency deviation, and a
binary zero is represented by a negative frequency deviation. The symbol
timing shall be better than ?20 ppm.

-> Frequency bands in different countries. Bluetooth SIG is working 
-> towards
harmonization of frequencies  

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Thank you!
Brett Winchester 
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Reading, Braille, volunteer Services
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