Update -
Me to Midland in email: Can you verify that the MXT275 is in fact wide and narrow band as stated above [in the previous email]? I can not find any documentation on that, and it is not referenced in the user manual.
Midland reply: The MXT275 was updated to wide/narrow band. The MXT275 with the USB-C on the front is the updated wide/narrow band . The older USB-A model is Narrow band only. We are sorry for any confusion.
Edited to add from subsequent email -
It is not user-selectable on the MXT275, so yes it is preprogrammed. All MXT275 channels have been preprogrammed narrow band. We do have a firmware update for the MXT275 with USB-C that makes the repeater channels wide band. Unfortunately, these can not be updated in the field. If the order is brought to us, Lanny or I can make sure a particular order is updated before shipment. They are coming from the factory with this firmware loaded, but what is currently being sold has not been updated.