As of right now you can use only 3 of them, 1 mAX as the main device and 2 satellites

Right now we can use only 3 mAX routers at the maximum (1 Main Router + 2 Satellite Routers). 

Good afternoon, hope you are doing fine. 

The mAX network only allows to have a maximum of 3 mAX devices connected: one is the main router (the one that connects to your cable modem/gateway) and two satellites. Unfortunately you cannot add a third satellite. 

Hope this could help you.

Like addicional info beside of the amout of W21 mAx Routers that you can configure, remember that only W21 can be used like satellites or main router,

W31 and W30 are not compatible with W21, so you cannot mixed them