The present invention allows telephony users and on-line users to communicate with one another using an instant messaging service. A coil is formed in a form of continuum in which a first winding unit wound clockwise around a bottom pole and a second winding unit wound counterclockwise around a top pole are alternatively coupled. A terminal connector is connected to the proximal end of the pacing lead and has a distal end formed with a first coupling feature. In response to the receipt of a user input gesture and a determination that the user interface is in a first operational state, a first action type is performed based on the type of the received user input gesture and the object type of the target object. The write error signal can inhibit a write operation or cause a rewrite of data. The device includes a tube, which forms a main channel, and at least one auxiliary channel connected to a source of respiratory gas.