This cellular network adapter gives Vizy network connectivity when/where WiFi or Ethernet isn’t available. It plugs into one of your Vizy (or Raspberry Pi’s) USB ports. It includes a SIM card for a pay-as-you-go network provider (US only). It supports 4G LTE bands B1/B2/B3/B4/B5/B7/B8/B20/B38/B39/B40/B41. This includes bands used in US, Europe and Asia.