A manually managed availability indicator in form of a sign for indicating of availability of an occupiable space the availability indicator comprising: - one or more mounting brackets (21-1,21-2) fixable to a mounting surface, wherein the one or more mounting brackets (21-1,21-2) comprise a first mounting bracket and a second mounting bracket, and wherein a first part of the first mounting bracket and a first part the second mounting bracket are arranged along a pivot axis; an indicating part movably connected to the one or more mounting brackets (21-1,21-2), wherein the indicating part is movable, between at least two positions (A,B), in relation to the one or more mounting brackets (21-1,21-2), wherein the first position is for indicating a state of vacancy of the occupiable space and the second position is for indicating a state of occupancy of the occupiable space, and wherein the indicating part comprises at least two slots (26-1,26-2), comprising a first slot and a second slot, wherein the first slot is configured to engage with an end of the first part of the first mounting bracket and the second slot is configured to engage with an end of the first part of the second mounting bracket; and - one or more detectors, configured to: o detect at least one of a change of position of the indicating part and a current position (A,B) of the indicating part; and o in response to the detection, wirelessly transmit, to a remote entity, at least one of a position change signal indicative of the change of position of the indicating part and a position status signal indicative of the current position of the indicating part. - one or more mounting brackets (21-1,21-2) fixable to a mounting surface, wherein the one or more mounting brackets (21-1,21-2) comprise a first mounting bracket and a second mounting bracket, and wherein a first part of the first mounting bracket and a first part the second mounting bracket are arranged along a pivot axis; an indicating part movably connected to the one or more mounting brackets (21-1,21-2), wherein the indicating part is movable, between at least two positions (A,B), in relation to the one or more mounting brackets (21-1,21-2), wherein the first position is for indicating a state of vacancy of the occupiable space and the second position is for indicating a state of occupancy of the occupiable space, and wherein the indicating part comprises at least two slots (26-1,26-2), comprising a first slot and a second slot, wherein the first slot is configured to engage with an end of the first part of the first mounting bracket and the second slot is configured to engage with an end of the first part of the second mounting bracket; and one or more mounting brackets (21-1,21-2) comprise a first mounting bracket and a second mounting bracket, and wherein a first part of the first mounting bracket and a first part the second mounting bracket are arranged along a pivot axis; an indicating part movably connected to the one or more mounting brackets (21-1,21-2), wherein the indicating part is movable, between at least two positions (A,B), in relation to the one or more mounting brackets (21-1,21-2), wherein the first position is for indicating a state of vacancy of the occupiable space and the second position is for indicating a state of occupancy of the occupiable space, and wherein the indicating part comprises at least two slots (26-1,26-2), comprising a first slot and a second slot, wherein the first slot is configured to engage with an end of the first part of the first mounting bracket and the second slot is configured to engage with an end of the first part of the second mounting bracket; and - one or more detectors, configured to: o detect at least one of a change of position of the indicating part and a current position (A,B) of the indicating part; and o in response to the detection, wirelessly transmit, to a remote entity, at least one of a position change signal indicative of the change of position of the indicating part and a position status signal indicative of the current position of the indicating part. o detect at least one of a change of position of the indicating part and a current position (A,B) of the indicating part; and o in response to the detection, wirelessly transmit, to a remote entity, at least one of a position change signal indicative of the change of position of the indicating part and a position status signal indicative of the current position of the indicating part.