Wow! 5* to Alfa on a decent omni directional 9db Antenna that actually works!
I bought 4 different products, a directional ariel from Alfa of 6db, junk!
A 16db omni aerial from China, junk! Also, a 25db high gain Yagi directional aerial. Not arrived yet from China.
Don't waste your money in desperation, like me, trying to get a decent WiFi network connection. Just buy the Alfa 9dbi Antenna. This nearly doubled the amount of WiFi strength I was getting with the 2.4ghz Alfa aerial.
If your a penetration tester or want to use it for wardriving, then this is the one for you.