Various example embodiments of the present disclosure provide an electronic device including: a housing including a substantially circular opening and a first surface facing in a first direction; a wearing structure configured to enable the electronic device to be removably worn on a part of a human body and connected to the housing; a display disposed in the opening; an annulus installed on the first surface and configured to be rotatable along a periphery of the opining, the annulus including a second surface facing a second direction opposite the first direction; at least one spacer interposed between a part of the first surface and the second surface of the annulus; and a circuit configured to detect a rotation of the annular member and to change the display at least in part based on the rotation.