A sliding portable telephone in which a second display section is provided on a surface exposed when an upper housing is slid, enabling self-shooting by a built-in camera. The pivot arm has a second brush support surface including a first portion and a second portion which are joined together and include free ends which are spaced apart. Where the pixel is part of an area fill feature, a second printing mask is selected that is optimized for printing area fill features. The center broadcasts the message to remotely located warning devices, which compare the received danger coordinates with their own GPS coordinates and determine the extent to which they are in danger. The automatic transmission bicycle includes a gear shifter in electrical communication with the voltage generator and configured to receive the current generated by the voltage generator.