An electrical assembly comprising plurality of heat producing devices in direct thermal contact with perforated heat pipe film. A server system 1 designates league members from a plurality of members who register to a normal pennant using a client computer 2, sequentially creates normal leagues consisting of the designated league members, and decides the game schedule of each created normal league. The small device is fixed to a driver’s safety belt or embedded in the back of driver’s seat without direct contacts to a user’s body.