An occupant restraining device is provided with a shielding member to be deployed from the peripheral edge of a window of a vehicle so as to shield the window. The spaces include a first group each displaying one alphabet letter. The profile sections at the Z distances being joined smoothly with one another to form a complete airfoil shape. In this manner, the control circuit may be operably associated with the stack of transistors in each attenuation circuit segment to control the variable attenuation level of the variable attenuator. Identification of other devices of the same or differing tiers of service, and interference mitigation between other tiered service devices based upon intercommunication between the devices, andor via a central registry database, are also disclosed. Since the radiation member is mounted to the second main body that does not frequently contact with a user during use of the portable apparatus, cooling of the portable apparatus can be efficiently performed.