Are you interested in joining the mesh? You will need to purchase a LoRa radio from the Supported Hardware list.
Check out the excellent FAQ on the Puget Mesh site for an introduction to the technology.
There is plenty of information available on the Meshtastic.org site for hardware information meshtastic.org/docs/hardware/ and some advanced technical information available on the Puget Mesh site as well for hackers/DIY heads Puget Mesh/Equipment