Fire TV Cube has a Micro USB port for an Ethernet Adapter and an Infrared port

Bundle TV Stick 4K Cube Accessories - OTG Cable, USB Ethernet Adapter and Micro USB Charging Cord : Electronics

Everything you can do with the Fire TV Cube's Micro USB port — Ethernet, App Storage, External Drives, Peripherals, FLIRC, OTG, and more

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Inteset USB 2.0 & Micro USB OTG Y Cable for Controlling The F-TV Stick, Pendent, or Cube, Supports Wireless Keyboards and The IReTV for Universal Remote Control. (IReTV not Included)

Works with the Inteset IReTV IR receiver (Not Included) for control of your Fire TV Streamer devices. Fully tested on each Device. No drivers are

USB 2.0 & Micro USB OTG Y Cable for Controlling The F-TV Stick, Pendent, or Cube, Supports Wireless Keyboards and The IReTV for Universal Remote

The different Micro USB OTG Adapters and Accessories that work well with the Fire TV Cube