Obri mesh add on satellite RBS10

Hi,

I've been looking to purchase Orbi mesh wifi add on satellites.  These satellites are difficult to find but when I find a satellite the price is twice as much as prices on Netgear.  I want to know if the Orbi mesh wifi add on satellite RBS10 compatible with the Orbi router CBR40?  Any help would be appreciated. 

Thanks, JFP