A mobile terminal includes a terminal body that is wearable on a part of a user’s body. Ink drawings and ink annotations are captured and stored with additional information that allows the various described methods to associate the ink with one or more displayed elements. In one example, the device has a frame with a side surface angled outwardly 12 degrees from the side of the boat, a mounting surface shaped to match the mounting area of the boat stern, and one or more vacuum cups. A sleeve is axially shiftable on the mounting shaft between a retracted position accommodating the establishment of the axially interengaged relationship, and an advanced position disrupting the axially interengaged relationship to thereby accommodate axial ejection of the pipette tip from the mounting shaft. Therefore, the operation of the manual operation handle in the electrical operation mode can be ensured to be prevented, avoiding the damages to the electrical operating apparatus, thsu enabling to provide a highly reliable apparatus for electrically operating a circuit breaker.