A control module (104; 204; 304; 404) for controlling energization of a relay module (350; 600), the control module (104; 204; 304; 404) for coupling to a socket (102; 202; 302) which comprises a socket terminal (122; 222; 322; 422) for energising the relay module (350; 600), the socket terminal (122; 222; 322; 422) being capable of electrical connection with a power terminal (124; 224; 324; 424) of the socket (102; 202; 302), the control module (104; 204; 304; 404) being characterized in that it comprises: a non-conductive lead (130; 230; 330; 430) for disposing between the socket terminal (122; 222; 322; 422) and the power terminal (124; 224; 324; 424) of the socket (102; 202; 302); a first conductive element (132; 232; 332; 432) disposed at a base of the control module (104; 204; 304; 404); a second conductive element (134; 234; 334) disposed at the base of the control module (104; 204; 304; 404), the second conductive element (134; 234; 334) being spaced apart from the first conductive element (132; 232; 332; 432); an actuator switch (140; 240; 340) disposed within the control module (104; 204; 304; 404), the actuator switch (140; 240; 340) being coupled to the first conductive element (132; 232; 332; 432) and the second conductive element (134; 234; 334), the first conductive element (132; 232; 332; 432) and the second conductive element (134; 234; 334) being arranged to provide an electrical path between the socket terminal (122; 222; 322; 422) and the power terminal (124; 224; 324; 424) of the socket (102; 202; 302) via the actuator switch (140; 240; 340); a wireless control module (142; 242; 342) coupled to the actuator switch (140; 240; 340), the wireless control module (142; 242; 342) comprising a wireless communication module to perform wireless communication with an external device; and wherein the actuator switch (140; 240; 340) is controllable by the wireless control module (142; 242; 342). a non-conductive lead (130; 230; 330; 430) for disposing between the socket terminal (122; 222; 322; 422) and the power terminal (124; 224; 324; 424) of the socket (102; 202; 302); a first conductive element (132; 232; 332; 432) disposed at a base of the control module (104; 204; 304; 404); a second conductive element (134; 234; 334) disposed at the base of the control module (104; 204; 304; 404), the second conductive element (134; 234; 334) being spaced apart from the first conductive element (132; 232; 332; 432); an actuator switch (140; 240; 340) disposed within the control module (104; 204; 304; 404), the actuator switch (140; 240; 340) being coupled to the first conductive element (132; 232; 332; 432) and the second conductive element (134; 234; 334), the first conductive element (132; 232; 332; 432) and the second conductive element (134; 234; 334) being arranged to provide an electrical path between the socket terminal (122; 222; 322; 422) and the power terminal (124; 224; 324; 424) of the socket (102; 202; 302) via the actuator switch (140; 240; 340); a wireless control module (142; 242; 342) coupled to the actuator switch (140; 240; 340), the wireless control module (142; 242; 342) comprising a wireless communication module to perform wireless communication with an external device; and wherein the actuator switch (140; 240; 340) is controllable by the wireless control module (142; 242; 342).