A piezoelectric resonator utilizes a thickness shear vibration mode, which allows for simplification of the manufacturing process, effectively suppresses ripples in the width mode, has superior frequency characteristics and is inexpensive. The adjustment arrangement includes a hanger bracket that has a pair of substantially parallel, spaced apart hanger legs projecting generally away from the vehicle and each of the hanger legs has an elongate aperture or slot that is mutually aligned, one with the other. One of the side walls has a pair of wall portions which converge inwardly of the body towards the center axis of the body and the other of the side walls has wall portions which converge outwardly from the axis of the body. The system comprises a wireless receiver having an estimator programmed, for example, using DSP or ASIC and imbedded into the wireless system design software for accomplishing the steps set forth according to the method.