A variable configuration apparatus has components or sub-systems. At least some components (200 and 201) have mechanical coupling elements (101 and 102 and 103) that enable the configuration of the apparatus to be varied by changing at least one of the relative orientation and position of those components or subsystems. These mechanical coupling elements (101 and 102 and 103) incorporate wireless signal coupling elements (205 and 206) that cooperate to provide a wireless coupling which enables wireless coupling between the components. The wireless coupling may be used to transfer at least one of data and power between the components. The wireless signal coupling elements may be capacitive coupling elements that provide capacitive coupling between the components or sub-systems. In an example, the apparatus is a video camera and one component or sub-system is a display screen (201) and another component or sub-system is the main body (200) of the video camera (200).