A vehicle glazing having a centring pin bonded thereto, and a centring pin suitable for a vehicle glazing are disclosed. The device can switch between the different interfaces to migrate an on-going communications session from one that requires the infrastructure of a fixed wireless communication network to one that does not require the infrastructure of a fixed wireless communication network. The voltage tester supplies one of first and second power supply source voltages to the power supply source input terminal of the internal device, in response to a test signal. Pipes, which pass through openings in the surfaces of the buttresses, are supported by molded in step-saddles of the buttresses.