For a list of all currently documented Atheros chipsets with specifications, see Atheros.
FCC approval date: 08 February 2010
UPC: 790069298578 (UPC DB, On eBay)
Country of manuf.: China
FCC ID: KA2WA552A3
Industry Canada ID: 4216A-WA552A
WI1 chip1: Atheros AR9223
2.4GHz Power Amplifier IC;Microsemi;LX5511;MSC, 5511, 752B;3;
Antenna connector: RP-SMA
Xtreme N Desktop Adapter
• Support page
Per the FCC photos, this device is using three Microsemi LX5511 2.4GHz Power Amplifier ICs (marked "MSC", "5511", "752B").
The same card is pictured in the FCC filing for the A2 revision.