An electronic shocking device comprising a voltage drop detector which signals an integrated circuit to record the occurrence of a shock when the device voltage drops within a preset tolerance corresponding to a recommended level of shocking current. The light pack may fit tightly but removably around the brush handle and may be snapped into place by a plurality of locking pegs on the light pack being pushed into tight fitting openings on the handle. The electronic document is then printed on a print medium in a media feed path of a printer module of the mobile telecommunications device. By determining the play starting position of the second content in this way, the image can be properly switched even in the case where the time length or the content configuration is different.