An animal face wrap including a single flexible band and at least one constrictor associated with the band. An icon CR1 of TV is displayed using an animation on a screen of the left side switch MF1a out of a MF switches MF1, while an icon CR2 of CD as an equipment presently selected is displayed using an animation on a screen of the right side switch MF1b, and in addition, a letter CD and a letter MD are seen at right and left under the icon CR2. Examples of the parameter reflective of the interventricular conduction delay include QRS width and interval between right and left ventricular senses.