A portable leaf blower having a fan unit with a fan and a combustion engine for driving the fan. The shift thyristor includes a first anode layer, a first gate layer, and a first cathode layer. The third housing mates to the first and second housings and supports a terminal array that connects the signal terminals in the first housings to the signal terminals in the second housing when the first and second wafer are arranged perpendicular to each other. A data transfer section transmits the first and second compressed image data through a network to an image display apparatus. In a preferred embodiment, the resilient member is an O-ring. On the first occasion a call is made from a terminal, the terminal transmits an identifier to the single call center and the call center transmits a temporary subscriber number to the terminal, thereby enabling said terminal to be called via the network, and said number is stored in the call center.