A high gain, highly linear mixer includes an input section, mixing section, at least one tuning component, and at least one stand by current source. The thermoelectric element has a stress releasing section which is formed between the first electrode and the thermoelectric material, and which includes a plurality of columnar portions. A plurality of valve housings are formed integrally with the body of the cover at a second side of the cover opposite the cooling water plenum opening. In this state, a rotation angle detection sensor detects an angle based on positions of the limiting members and outputs a signal based on the angle and an auxiliary sensor judges presence or absence of the limiting members in a certain range and outputs a signal. The condition may be a weather pattern, for example, snow in which case, the information being transmitted may be road icing information.