Class 3: 5 meters
Class 2: 10 meters
Class 1: 100 meters
These are test bench values and real world distances may be shorter or longer.
30 feet, 10 meters
First of all, Bluetooth is only officially specified to reach about 100 meters, maximum. Any device that claims to reach further is not in proper conformance with the Bluetooth standard. Secondly, even if the dongle could transmit data that far, it cannot receive data from a device that does not transmit at the same power level. So you'll never be able to use your Bluetooth headset from 250 meters away, unless you either find a way to increase the transmission power of the headset,or build a massive antenna for your dongle.
185 meters
100 meters.
For use in networks the maximum segment length would be 500 meters
40 meters
The maximum East-to-West distance is 200000 metres, approx.
90 meters
@3100 meters more like 500 meters for single target effectiveness though.
90 Meters+ 10 meters for running cables so 100 meters is the total.
40 meters inside of the building max, and about 140 meters on open space also maximum.
Depends on the coax type - thinnet coax is 185 meters per segment, thicknet is 500 meters