Device that displays the current state of the parameters of a certain, such as the charging of the battery. Parameter sensing device configured to sense a parameter value is connected to the control unit, the control unit is configured to display on the display the indicator area. The indicator area is defined in the indicator frame, characterized area portion of the indicator area to represent a relative parameter level. The gyro sensor is connected to the control unit, the control unit has an upper border appears controlled according to the detection result of the gyro sensor of the area portion, of a region has been characterized and is held substantially horizontally configured to display as the bottom of the indicator area. In this way, the region portion is characterized, will be experienced as the fluid trapped in the bin represented by the indicator frame.
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