ALFA AWUS036ACM USB Network Driver

Basic Specs:

Frequency: 2.412GHz – 2.472GHz/ 5.15GHz – 5.825GHz
Antenna: 2x External detachable dual-band
2.4GHz+5GHz 5dBi antenna
Antenna Connector: RP-SMA female
Channel Width: 20 / 40 / 80MHz
LED Indicators: Power, WLAN
 

Download:

 
3