The size of the connector on the antenna of the cab 2 ?

I bought mine on Amazon.  It states "RP-SMA".

Brendan

It's a reverse-SMA, commonly refered to as the RP-SMA as Brendan states.  It's the same connector that is widely used for 2.4ghz WiFi antenna products, so it's a very common product.

Wonder why the antenna products mate with the RP-SMA which has a male pin on the male shell, and the rest of the world use an SMA mail shell with female center connector?

I wondered that years ago Chuck, never could figure why they did that.  I used to use a ton of normal SMA connectors when I was building video products for the NYSE and member firms in the 80's and 90's, still have a box of gold plated SMA connector cables around here somewhere.  When WiFi came along big time, I thought I had a sea of useful cables, only to find out they did the screwball reverse pin nonsense!   There didn't seem to be any rational reason for changing the connector type, and I never did understand why they had to make it difficult to connect the WiFi stuff with all the existing hardware that would have worked just fine.

thank you guys for the information