An electronic device comprising: a display device having a screen; an input/output device separate from the display device and configured to provide visual information and to receive input information via a touch, the input/output device comprising: a touch sensing module configured to receive the touch; at least one light emitting module configured to emit light of at least one specific color; and a light guiding module configured to guide the light emitted from the at least one light emitting module and including a light penetrating area on at least a part of the light guiding module; and a controller operatively connected to the display device and the input/output device, the controller configured to: change a configuration setting value based on a movement of the touch on the input/output device, change a sensitivity of the change of the configuration setting value in accordance with a predetermined form of the touch, and provide a feedback representing the changed sensitivity through the input/output device, wherein the feedback is output differently depending on types of the configuration setting value that are to be changed, and wherein the controller is adapted to change at least one of the light color composition and the light brightness level, emitted by the at least one light emitting module and the light guiding module, based on the touch received through the input/output device. a display device having a screen; an input/output device separate from the display device and configured to provide visual information and to receive input information via a touch, the input/output device comprising: a touch sensing module configured to receive the touch; at least one light emitting module configured to emit light of at least one specific color; and a light guiding module configured to guide the light emitted from the at least one light emitting module and including a light penetrating area on at least a part of the light guiding module; and a touch sensing module configured to receive the touch; at least one light emitting module configured to emit light of at least one specific color; and a light guiding module configured to guide the light emitted from the at least one light emitting module and including a light penetrating area on at least a part of the light guiding module; and a controller operatively connected to the display device and the input/output device, the controller configured to: change a configuration setting value based on a movement of the touch on the input/output device, change a sensitivity of the change of the configuration setting value in accordance with a predetermined form of the touch, and provide a feedback representing the changed sensitivity through the input/output device, wherein the feedback is output differently depending on types of the configuration setting value that are to be changed, and wherein the controller is adapted to change at least one of the light color composition and the light brightness level, emitted by the at least one light emitting module and the light guiding module, based on the touch received through the input/output device. change a configuration setting value based on a movement of the touch on the input/output device, change a sensitivity of the change of the configuration setting value in accordance with a predetermined form of the touch, and provide a feedback representing the changed sensitivity through the input/output device, wherein the feedback is output differently depending on types of the configuration setting value that are to be changed, and wherein the controller is adapted to change at least one of the light color composition and the light brightness level, emitted by the at least one light emitting module and the light guiding module, based on the touch received through the input/output device.