More seriously, you'll need to get a case and a power adapter. You can do the optional upgrade to 2GB of RAM for an additional Rs. 460 over the standard 1GB. Not really required if you only plan on running ezbeq, based on what people using it so far have posted.
The above is the for the Raspberry Pi 4 device from fabtolab. You'll also need a microSD card and an adapter to connect it to the PC so you can download the Raspberry Pi imager (
https://www.raspberrypi.org/software/) and write the image to the card. You then insert that microSD card in the slot provided in the Pi 4 device and run the instructions provided at
https://ezbeq.readthedocs.io/en/latest/rpi/ to install minidsp-rs and ezbeq.