Regular routers are very good at wirelessly connecting all of your network devices. If you have a VPN account, you can run it on your computer that is on this network, but you can not share that account connection with other devices on that network.
VPN Routers by Sabai allow your VPN account to be run on the router itself, meaning you can run multiple network devices on the VPN simultaneously. For example, you can have a laptop in the kitchen streaming Pandora over VPN while your child is playing Xbox Live over VPN in the living room - all on a single VPN account. In many ways, it functions exactly the same way a regular router does except with added functionality that Sabai optimizes for the best VPN experience possible.