A peripheral device intended to be coupled in a mobile and removable manner to an electronic payment terminal having contactless communication. The peripheral device includes at least one first portion of a contactless communication of the electronic payment terminal and at least one connector that cooperates, when the peripheral device is coupled to the electronic payment terminal, with at least one complementary connector on the electronic payment terminal. The connectors form a wireline communication between the first portion of the contactless communication of the peripheral device and the electronic payment terminal.