Are Arlo Pro 3 & Arlo Ultra compatible? If so, which hub do I use for Ultra?

[Alye]

I bought an Arlo pro 3 & I want to purchase Arlo Ultra as well. Are they compatible? If so, which hub do I use the Ultra? Or should I just use the Ultra & buy 3 additional Ultra cameras? Please help with advise.
Thank you

[jguerdat]

There are FAQs and product documents here that have these answers. Basically, the Pro 3 and Ultra are compatible with each other so it really doesn't matter which way you go. I'd choose the mix according to pricing.