Every product photos of the site refer to a range of different models. Some displayed optional accessories are not disponible in all the models of the family product
Printers Accessories TSC Accessories for printers
TSC Interface, 1x GPIO, 1x USB Host, 1x Ethernet, 1x PS/2, 1x SD slot, fits for: TTP-246M Pro Series
TSC Interface, 1x GPIO, 1x USB Host, 1x Ethernet, 1x PS/2, 1x SD slot, fits for: TTP-246M Pro Series