Abstract: The present disclosure relates to a system (100) comprises a smartboard (10) and a remote controller (20), wherein the smartboard (10) comprises a frame structure (11), wherein a plurality of transmitters (111) and receivers (112) is arranged at the frame structure (11) and configured to transmit and receive radio signals (40) within a plane defined by the frame structure (11); and wherein the smartboard (10) further comprises a controller unit (12) coupled to at least one of the one or more of the plurality of transmitters (111) and receivers (112). The remote controller (20) is configured to provide a radio control signal (30) to the frame structure (11) and the controller unit (12) is configured to control the smartboard (10) based on a detection that the at least one of the one or more of the plurality of transmitters (111) and receivers (112) has received the radio control signal (30).

Abstract: A mainboard for a display panel has at least one socket for receiving a cable. The socket is rotatable between first and second orientations. This enables the socket to be oriented to face sideways if the display panel is mounted on a wall and to face rearwards if the display panel is not mounted on a wall.

Abstract: A battery for delivering electrical power at a battery voltage has a body having a first end and a second end. A first terminal of a first polarity is provided at the first end and a second terminal of a second polarity provided at the second end. The body is expandable and collapsible along its length so as to move the first terminal and the second terminal apart from each other and closer to each other respectively so as to change the length of the battery. The battery has the circuitry arranged to set the battery voltage in accordance with the length of the battery.

Abstract: There is provided an electrical socket apparatus 200 comprising a slot 210 for receiving a pin 310 of a corresponding electrical plug 300. The apparatus 200 comprises a light sensor 212 arranged relative to the slot 210 and configured to receive light emitted by a light source 312 of a said electrical plug 300. The slot 210 is movable to a position in which the slot 210 is aligned with the pin 310 of a said electrical plug 300 on the basis of light emitted by a light source 312 of a said electrical plug 300 and received by the light sensor 212.

Abstract: A mainboard for a display panel has at least one socket for receiving a cable. The socket is rotatable between first and second orientations. This enables the socket to be oriented to face sideways if the display panel is mounted on a wall and to face rearwards if the display panel is not mounted on a wall.

Abstract: There is provided an electrical socket apparatus 200 comprising a slot 210 for receiving a pin 310 of a corresponding electrical plug 300. The apparatus 200 comprises a light sensor 212 arranged relative to the slot 210 and configured to receive light emitted by a light source 312 of a said electrical plug 300. The slot 210 is movable to a position in which the slot 210 is aligned with the pin 310 of a said electrical plug 300 on the basis of light emitted by a light source 312 of a said electrical plug 300 and received by the light sensor 212.