Embodiments are provided for causing a playback device to be automatically added to a secure network for rendering media in synchrony with other devices in the secure network. A boundary between a region where the antenna element is in contact with the connecting portion and a region where the antenna element is in contact with the antenna housing is nonlinear. The movable die section or sections are supported for movement in a common plane and include camming pins engageable with slots formed in the support member, such that the engagement of the pins with the associated slots define paths of movement for the die sections. A first sleeve and a second sleeve each define a gripping surface thereon and one of the first and second sleeves is axially reciprocal on the body.