Rogers Xfinity Gateway Generation? (Related Wifi Standard)

[CJBob]

I apologize if this was previously asked, I searched but couldn't find it. How can I tell what Rogers Xfinity Gateway  Generation I have? Specifically I'm trying to find out which wifi standard is being used (2, 4 or 5?) The modem is fairly old so I don't think it can be 6. 

I've taken a picture of the back of the modem but I don't see anything that looks like a model number. It's black and appears to match the Generation 1 picture from the Rogers site if that helps. 

Thanks

Bob

*Added Labels*

[-G-]

All of the Rogers Xfinity gateways are shown here: https://www.rogers.com/support/internet/setup-install

The Gen 1 (XB6) is the only dark-coloured gateway.  It supports Wi-Fi 5, and it is typically offered on lower speed tiers.

[-G-]

More information about Comcast's gateways can be found here: https://www.xfinity.com/support/articles/broadband-gateways-userguides

Rogers currently offers the XB6, XB7 and XB8 gateways with their Xfinity Internet service.