A regulator for regulating a charge pump is provided. The circuit board and the liquid crystal module are received in the chassis. The parasitic BJTs and the field transistor may be configured to remain cut off so long as an input voltage at the pad is between a negative V1 voltage and a +V2 voltage, thereby allowing a greater input voltage swing without signal clamping. Every cell contains a unique combination of O, E, A, and V. The call center selects an agent, and initiates a watch for an arriving IPNT call from the browsing person.