Depends on both what "support" means and how you use it. The wifi protocols don't put a limit on how many devices you can attach, those come from 1 of two things: 1) how much bandwidth each device uses so this limit is mostly what you're willing to tolerate 2) the IP address space you use. The default for Netgear devices is to use dhcp to provide address on the 192.168.1 network. This network can have 254 unique addresses, and one of them is taken up by the router itself, so you can support another 253 devices using the default config. Since these devices use NAT, (assuming you don't turn it off), you can use any network you like and, for example, put yourself on the 10 network which would give a huge number of possible addresses. The possible limit here is the ability of the router to do the bookkeeping necessary to do the Network Address Translation (that's what NAT means) for that many devices. I have no idea what this limit might be, you might find a practical limit by doing some internet searches or asking NetGear.