A module (38), a terminal (12) including the module, and a system (10) including the terminal (12), are described. The module may be a printer module (38) comprising a print engine (60), a microcontroller (62), and a wireless receiver (66), such as a wireless modem, so that the module (38) is operable to receive data from a remote server (18) and to print the received data. The module (38) also includes a coupler (70 or 270) for directing data received from the wireless modem (66) to the microcontroller (62) and for directing data from the terminal (12) to the microcontroller (62). A method of printing tickets at a terminal (12) and a method of retro-fitting a self-service terminal (12) are also described.