Abstract: A shroud for a mask system includes a retaining portion structured to retain a frame, a pair of upper headgear connectors each including an elongated arm and a slot at the free end of the arm adapted to receive a headgear strap, and a pair of lower headgear connectors each adapted to attach to a headgear strap. The retaining portion, the upper headgear connectors, and the lower headgear connectors are integrally formed as a one piece structure.

Abstract: A mobile telephone is provided that comprises: a core functional module, which includes one or more of a group of functional components necessary for operation as a mobile telephone, the group including logic circuitry, radio transmitting and receiving circuitry and audio transmitting and receiving circuitry, and a casing module which can be combined with the core functional module, wherein circuitry is associated with the casing module and wherein when the core functional module is combined with the casing module, the circuitry of the core functional module will be connected to circuitry associated with the casing module. The mobile telephone is characterised in that the appearance of the mobile phone is dictated by the appearance of the casing module, and the functionality of the mobile phone is dictated by the circuitry of the core module and the circuitry associated with the casing module.