Technically no. netBlazr does not provide a router with service, and can complete an installation without one present. If you don’t have a router, you can still connect to the internet by attaching an ethernet cord between any device with an ethernet port and your netBlazr port in your unit.
However, most modern households make use of multiple devices on the internet at one time. To achieve this, or to connect to the internet wirelessly in general, you’ll need a wireless router.