A watch type control device comprising: a band configured to surround at least a portion of a user's wrist; an IR module disposed on a side of the band facing the user's hand when the watch type control device is worn on the user's wrist, the user's hand and wrist being on the same side of the user's body; and a beam projector disposed on the band and configured to outwardly project a screen, wherein the IR module is configured to recognize a user's hand gesture and to initiate the execution of a program causing the beam projector to output on the screen a display corresponding to the program, characterised in that the IR module is further configured to be repositioned along the side of the band, wherein the band comprises: an outer band; and an inner band coupled to the outer band, wherein the inner band is positioned between the outer band and the user's wrist when the watch type device is worn on the user's wrist, wherein the IR module is coupled to the band between the outer band and the inner band and movable along the side of the band between the outer band and the inner band, wherein a surface of the outer band facing the inner band comprises a first recessed rail extending parallel to the side of the band, wherein a surface of the inner band facing the outer band comprises a second recessed rail extending parallel to the side of the band, and wherein the IR module comprises a guide plate disposed, at least in part, between the outer and inner bands, the guide plate having a first portion projecting into the first recessed rail of the outer band and a second portion projecting into the second recessed rail of the inner band such that the first and second portions of the guide plate slide along and within the first and second recessed rails, respectively, when the IR module moves along the side of the band. a band configured to surround at least a portion of a user's wrist; an IR module disposed on a side of the band facing the user's hand when the watch type control device is worn on the user's wrist, the user's hand and wrist being on the same side of the user's body; and a beam projector disposed on the band and configured to outwardly project a screen, wherein the IR module is configured to recognize a user's hand gesture and to initiate the execution of a program causing the beam projector to output on the screen a display corresponding to the program, characterised in that the IR module is further configured to be repositioned along the side of the band, wherein the band comprises: an outer band; and an inner band coupled to the outer band, wherein the inner band is positioned between the outer band and the user's wrist when the watch type device is worn on the user's wrist, wherein the IR module is coupled to the band between the outer band and the inner band and movable along the side of the band between the outer band and the inner band, wherein a surface of the outer band facing the inner band comprises a first recessed rail extending parallel to the side of the band, wherein a surface of the inner band facing the outer band comprises a second recessed rail extending parallel to the side of the band, and wherein the IR module comprises a guide plate disposed, at least in part, between the outer and inner bands, the guide plate having a first portion projecting into the first recessed rail of the outer band and a second portion projecting into the second recessed rail of the inner band such that the first and second portions of the guide plate slide along and within the first and second recessed rails, respectively, when the IR module moves along the side of the band. an outer band; and an inner band coupled to the outer band, wherein the inner band is positioned between the outer band and the user's wrist when the watch type device is worn on the user's wrist, wherein the IR module is coupled to the band between the outer band and the inner band and movable along the side of the band between the outer band and the inner band, wherein a surface of the outer band facing the inner band comprises a first recessed rail extending parallel to the side of the band, wherein a surface of the inner band facing the outer band comprises a second recessed rail extending parallel to the side of the band, and wherein the IR module comprises a guide plate disposed, at least in part, between the outer and inner bands, the guide plate having a first portion projecting into the first recessed rail of the outer band and a second portion projecting into the second recessed rail of the inner band such that the first and second portions of the guide plate slide along and within the first and second recessed rails, respectively, when the IR module moves along the side of the band.