Buffalo WLI2-PCI-G54S User Manual page 30

Communication Range
Speed
54Mbps
11Mbps
1Mbps
All distances are estimated. Wireless connections may be affected as physical conditions and circumstances vary.
Indoor
165 ft. (50m)
300 ft. (90m)
375 ft. (115m)
0
Specifications
Outdoor
525 ft. (160m)
1310 ft. (400m)
1750 ft. (550m)