Senao SL-2511CD PLUS EXT2

with Two Antenna Jacks for Embedded System

Datasheet

This was, at one point, a rather popular card.. thanks to it's 100 mW / 200 mW power output and high receiver sensitivity.
 * It was also sold (and may be more common) as the EnGenius NL-2511CD PLUS EXT2.

Additional specifications, per Senao's datasheet (mirrored here), follow...

RF Output Power
 * 23 dBm (FCC models), 20 dBm (CE models)

hostap diag + addl. info dumps
.. however, the STA firmware was upgraded.

Additional external links

 * Senao Card on the Seattle Wireless Wiki