A subscriber cluster unit for a wireless telecommunication system provides a wireless interface with a base station for a plurality of subscriber units. After the flex circuit is shaped in a tight radius and attached to a mechanical structure, the conductive epoxy is cured to act as functional replacement of the removed copper. Electronic management of building plans reduces cost and risk of damage associated with paper drawings. The nesting piece can be moved from a first position where the sonic connector is received inside the nesting piece to a second position where the sonic connector is separated from the nesting piece when ultrasound energy is being propagated through the ultrasound transmission member. The first connecting portion is used to be inserted by a heating end of a second heat pipe. The server identifies a similar piece of music reproduced by the terminal and the other terminal by referring to the favorite list and selects a piece of music reproduced by the other terminal but not reproduced by the terminal.