An apparatus for fixing a flexible printed circuit board module to a sliding mechanism of a portable electronic device is provided. Upon approach of a train, the grade crossing warning system begins transmitting an encoded signal including such as information on the approach of the train and what of any of the functional aspects of the warning system may be non operational such as the warning lights, and the crossing gate. The present invention also provides methods for suppressing pharmaceutically-induced histamine release by administering to an animal, the formulations of the present invention. The thermostat housing also includes least two thermostats within the housing member. The test chamber includes a venting device for gases and is surrounded by a sealed enclosure.