Which of the following is a point-of-sale (POS) station output device?

A thermal printer is a commonly used output device at point-of-sale (POS) stations. This type of printer is designed to quickly and efficiently print receipts and other transaction documents by using heat to transfer ink onto paper. In retail and hospitality environments, where fast service is critical, thermal printers are favored for their speed and reliability.

In contrast, the other options serve different purposes that do not align with the primary function of output in a POS setting. A mouse is an input device, used to control the computer cursor, while a scanner is also an input device that captures information from barcodes or documents. A network router, meanwhile, facilitates communication between different devices over a network and does not serve as an output device in the context of a POS system. Therefore, the thermal printer stands out as the correct choice for a POS station output device.