MarWu
lvl.2
Flight distance : 11555 ft
Germany
Offline

Assuming that the FCC range for FCC with 631 mW (2,4 GHz) and 1259 mW (5,8 GHz) is reached and assuming that the received power decreases with ^2 of the distance, you could calculate the range for the CE standard by:
range_CE = range_FCC * sqrt(power_CE / power_FCC)
Whith these assumptions you get 1,4 km (2,4 GHz) and 563 m (5,8 GHz). Just to be clear...these are basic calculations, which only take the emitted power into account and none of the other mentioned factors of influence. 
