Home Assistant Green provides several interfaces:

• 3 status LEDs.
• MicroSD slot and an HDMI port for recovery and diagnostics.
• 2 USB ports to extend the functionality, such as:
  • Connect ZBT-1 to communicate with Zigbee devices, and in the future with Thread devices.
  • Z-Wave stick to communicate with Z-Wave devices.
• Power supply port: 12 V DC, 1 A, center-positive