A pressure sensor includes a case, terminals, a pressure sensing element, a port, and a temperature sensing element. The transmitter and the receiver according to the present invention realize a voice communication service of high quality by using additional bits permitted in system requirements while using a conventional speech coder as it is. Most preferred is an Apolipoprotein A-1 mimetic peptidephospholipid complex, the peptide of which is defined by the amino acid sequence of SEQ ID NO 1. A third position of the panel with respect to the base is intermediate between the first position and the second position. In another aspect one aspect, lowering the weapon mounting height of the night vision device allows the night vision system to be mounted at an appropriate height for use on a helmet mounting system in a binocular system having a thermal camera or other type of viewing device.