Compatible HDMI Adapters for Flex 3 Hardware

Last updated: Feb 27, 2026, 1:12 PM

Question

Which HDMI adapters are compatible with Flex 3 Hardware?

Answer

The following USB-C® to HDMI adapters are compatible for connecting a Flex 3 terminal to an external display. These adapters function only when connected directly to the Flex 3 Guest/Accessory port.

Some options are simple USB-C to HDMI adapters. Others are multiport USB-C hubs that include HDMI output. 

When selecting an option, confirm whether a separate HDMI cable is required or if the adapter connects directly to the display. 

 

These are third-party adapters and are not Toast products. Users are encouraged to review and confirm specifications independently. This list is provided for informational purposes only and does not constitute an affiliation, endorsement, recommendation, sponsorship, or approval by Toast.

 

Compatible USB-C to HDMI adapters:

  • Amazon Basics USB-C to HDMI Adapter
    • Best for: Installations where you want flexibility to use an existing HDMI cable or choose a custom cable length.
    • Connection to External Display: HDMI receptacle
    • HDMI Cable Required: Yes
    • Additional Ports: None
    • Length: 4 in
  • uni USB-C to HDMI Cable
    • Best for: A simple, single-cable setup with a direct connection to the display.
    • Connection to External Display: HDMI plug
    • HDMI Cable Required: No
    • Additional Ports: None
    • Available Lengths: 3 ft, 6 ft, 10 ft
  • Anker USB-C to HDMI Adapter
    • Best for: Installations where you want flexibility to use an existing HDMI cable or choose a custom cable length.
    • Connection to External Display: HDMI receptacle
    • HDMI Cable Required: Yes
    • Additional Ports: None
    • Length: 6 in

 

Compatible USB-C Hubs with HDMI Output:

These options are appropriate for setups that require HDMI output along with additional USB connectivity for peripherals. All hubs listed below require a separate HDMI cable.

 

  • Anker USB-C Hub 5-in-1
    • Best for: Setups that require HDMI output and multiple USB-A device connections.
    • Connection to External Display: HDMI receptacle
    • HDMI Cable Required: Yes
    • Additional Ports: 
      • 1 USB-A, USB 3.0
      • 2 USB-A, USB 2.0
  • UGREEN USB-C Hub 5-in-1
    • Best for: Setups that require HDMI output and multiple USB-A device connections.
    • Connection to External Display: HDMI receptacle
    • HDMI Cable Required: Yes
    • Additional Ports:
      • 1 USB-A, USB 3.0
      • 2 USB-A, USB 2.0
  • Anker USB-C Hub 7-in-1
    • Best for: Setups that require HDMI output plus expanded peripheral connectivity.
    • Connection to External Display: HDMI receptacle
    • HDMI Cable Required: Yes
    • Additional Ports: 
      • 2 USB-A, USB 3.0
      • 1 USB-C®, USB 3.0
      • 1 SD card slot
      • 1 microSD card slot

 

Note: If the external display does not appear after reboot, disconnect and reconnect the USB-C hub. Then disconnect and reconnect the HDMI cable from the hub.

 

USB-C® is a registered trademark of USB Implementers Forum.

 

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