There is disclosed a wristwatch including a middle part defining a middle plane, conductive means for attaching the wristband to the middle part, a radio-frequency module arranged inside the middle part and connected, on the one hand, to a ground plane and, on the other hand, to a radiating element, insulated from each other and forming an antenna. The container structures have a dielectric cap on the top of a conductive container to reduce the risk of container-to-container shorting by insulating against bridging of conductive debris across the tops of adjacent container structures. When the analog line is idle, both the analog device and the DSS are connected to the line in order to receive incoming calls on the analog line. The entrance surface of the optical element means a surface of the optical element where the laser beam is incident first. If the login credentials are not authenticated, access to the restricted function is denied; whereas, if the login credentials are authenticated, access to the restricted function is permitted. Each of the elastic members is hollow and includes a base that is substantially parallel to the tension mask, with extensions formed substantially perpendicular to the base at both ends thereof, and bending portions integrally formed between the base and the extensions.