A remote control device (d100) comprising: a first housing (h10); a first transmission circuit (c50), configured to emit infrared light in a direction towards a first face of the first housing (h10); a second transmission circuit (c55), configured to emit infrared light in a direction towards a second face (h11) of the first housing (h10); a first infrared window (w40) configured to cover at least part of the first transmission circuit (c50) and to transmit the infrared light emitted by the first transmission circuit (c50) therethrough; a window button (b30) coupled to the second face (h11) of the first housing (h10), comprising a second infrared window, wherein the window button (b30) is configured to cover at least part of the second transmission circuit (c55) and to transmit the infrared light emitted by the second transmission circuit (c55) through the second infrared window; and a second housing (h20), wherein the second housing (h20) is configured to be coupled with the first housing (h10) and the second housing (h20) includes a hole (ho20) to be coupled with or to be separated from the window button (b30), and wherein the second housing (h20) is configured: to expose the window button (b30) and cover a part of the first housing (h10) when the window button (b30) is coupled with the hole, and to uncover the part of the first housing (h10) so that part of the first housing (h10) is exposed outside the second housing (h20) when the window button (b30) is separated from the hole (ho20); wherein the window button (b30) is configured to be separated from the hole (ho20) in response to being pressed by an external force. a first housing (h10); a first transmission circuit (c50), configured to emit infrared light in a direction towards a first face of the first housing (h10); a second transmission circuit (c55), configured to emit infrared light in a direction towards a second face (h11) of the first housing (h10); a first infrared window (w40) configured to cover at least part of the first transmission circuit (c50) and to transmit the infrared light emitted by the first transmission circuit (c50) therethrough; a window button (b30) coupled to the second face (h11) of the first housing (h10), comprising a second infrared window, wherein the window button (b30) is configured to cover at least part of the second transmission circuit (c55) and to transmit the infrared light emitted by the second transmission circuit (c55) through the second infrared window; and a second housing (h20), wherein the second housing (h20) is configured to be coupled with the first housing (h10) and the second housing (h20) includes a hole (ho20) to be coupled with or to be separated from the window button (b30), and wherein the second housing (h20) is configured: to expose the window button (b30) and cover a part of the first housing (h10) when the window button (b30) is coupled with the hole, and to uncover the part of the first housing (h10) so that part of the first housing (h10) is exposed outside the second housing (h20) when the window button (b30) is separated from the hole (ho20); to expose the window button (b30) and cover a part of the first housing (h10) when the window button (b30) is coupled with the hole, and to uncover the part of the first housing (h10) so that part of the first housing (h10) is exposed outside the second housing (h20) when the window button (b30) is separated from the hole (ho20); wherein the window button (b30) is configured to be separated from the hole (ho20) in response to being pressed by an external force. <EOS>