A front side-part structure of a vehicle includes a reinforcing member forming a closed section with a fender apron upper panel, fender apron inner panel, and front side member improves a coupling rigidity therebetween. The head includes a fluid channel member and a piezoelectric substrate on the fluid channel member. Further, a connector is mounted on opposing faces of the frame. The optical channel is designed in such a manner that at least two focal points are formed in it. The temperature compensated clock provides a time reference for both the processing circuitry and the on-chip UART.