A mouse with multiple side buttons may provide a user with ease of accessing buttons and assigning macro keys to each buttons. However, such a mouse may not take into account the comfort and feel of the user when engaging with the buttons, and manipulation of the side buttons can cause strain or fatigue to the hands. According to various embodiments, an input device comprises: a housing; a plurality of buttons; and an actuator configured to change a position of the plurality of buttons relative to the housing.