A housing that can be used to form and maintain a fluid-tight connection between a container and a medical device. The backlight unit is backlight unit comprising a light source composed of multiple light emitting diode groups each including a given number of serially connected light emitting diodes ; and lighting circuit for lighting the light source in accordance with a light control signal. The guide member is configured such that an end of the brake cable is brought into contact with the guide member and guided into engagement with an engaging portion of the brake lever when the end portion of the brake cable is introduced into the interior of the brake device at a predetermined position of the brake device. The lower blade is configured to move relative to hair trimmer in a longitudinal direction perpendicular to forward edge of upper blade upon movement of actuation member.