Abstract: A watertight universal housing (1) which allows video cameras, or other electronic devices, to be operated under-water. The term “universal” is intended to indicate the housing's suitability for use with a range of different video cameras or other electronic devices. The watertight universal housing has a sealable internal cavity (3) which is adapted to receive a remotely controllable electronic device (4), a programmable controller (6): and an electromagnetic signal transmitter (5) in the housing which is controlled by the programmable controller. The programmable controller is designed to receive a command to control the remotely controllable electronic device from a command providing device (8). The controller then causes the electromagnetic signal transmitter to selectively transmit electromagnetic signals corresponding to that command to the remotely controllable electronic device.