The present invention relates a speaker having a diaphragm around the rim of a frame on the speaker for disposing a magnetic member at the center of the diaphragm along the direction of a resonant space enclosed by the diaphragm and the frame. The telephone communications are converted into data packets and routed to the call center using VoIP technology. Other information, such as product specification, storage requirements and surgical techniques can also be accessed by the hand held device. The primary coil of the external stimulator inductively transfers electrical signals to the lead-receiver, which is also in electrical contact with the left vagus nerve.