An improved line driver and method for increasing the power efficiency, signal accuracy, and stability of a transmit signal on a transmission line are disclosed. The system has a server that makes available a 3D graphic model of the item as well as reservation statuses of the shares of the item for inquiries, and a client computer for displaying the 3D graphic model on a user screen from an arbitrarily changeable perspective. The invention also relates to process for preparing such compositions. The heat generated by the hot portion of the thermal bend arm can heat up the cold portion.