Last updated: Mar 24, 2026, 11:12 AM
Learn the importance of checking hardware compatibility before making new purchases.
Before purchasing new hardware components, it is important to make sure the new hardware will be compatible with your existing setup. The most common incompatibility issues arise when purchasing new card readers or purchasing handhelds for the first time. If you are unsure what hardware you already have on hand, you can reference What Kind of Hardware Do I Have? to confirm.
If you are looking to purchase a new card reader and have confirmed the hardware to which you would like to add this reader, you can then reference the valid card reader configurations for the different terminal setups outlined below.
Only one card reader can be used on a device that doesn't have a GFD. Any of the following models are compatible with this kind of terminal:
| Model | Compatible Terminal |
| Elo Devices |
|
| In-Store Kiosk (Elo) |
|
| Toast Flex Terminal |
|
| Elo Terminals with GFD | Notes |
| Employee Terminal with Direct-Attach GFD |
|
| Employee Terminal with Wedge Mount GFD |
|
Notes:
| Toast Flex with GFD | Notes |
| Flex Terminal with Direct Attach GFD |
|
| Flex Terminal with Flex Counter GFD |
|
Notes: