The invention discloses a portable device providing access to the Internet. By such a negative feedback circuit structure, a path for controlling a buzzer output is set to be one system and stability of the buzzer output can be enhanced. The biasing mechanism may comprise magnetic biasing elements attached to each oppositely disposed locking element, the magnetic biasing elements structured to create a repulsive magnetic force between one another. The hollow cylindrical body includes a smooth peripheral side surface free of thread formed thereon.