For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.
Broadcom single chip, 2x2 MIMO, component of an 802.11n router
output power - 2x2 13.5-16.5 dBm, 11g 13.5-16.5 dBm, 11b 15.5-18.5 dBm
receive sensitivity (typ.) - 54m -68 dBm, 11m -85 dBm, 6m -86 dBm, 1m -93 dBm