A collapsible protective cover for the trunk of a motor vehicle that extends from the trunk and therebeyond to protect an individual from environmental elements while accessing the trunk. A resonator of the serial resonators and the parallel resonators in the transmitting filter that is arranged closest to a common terminal of the transmitting filter and the transmitting filter includes a surface acoustic wave resonator, and at least one resonator excluding the resonator that is arranged closest to the common terminal includes a film bulk acoustic wave resonator. Within the spacer is a flow control disc having one or more apertures. , so as to cancel the photocurrent. A follower mounts at the top of the frame and slides in the slot and resting in the end portion when the top is in the use position. The semiconductor lasers are mounted on a first surface of the substrate and the driver ICs are mounted on a second surface of the substrate opposite to the first surface.