An in-vehicle camera unit has a body to which a lens is attached and prevention members that prevent water drops from falling on the lens. In one embodiment, the interrogator includes a metal sensing subsystem configured to provide a first signal having a signature representing a presence of a metal object, and a RFID sensing subsystem configured to provide a second signal having a signature representing a presence of a RFID object. One or more color tiles based on colors found in a previous print job are pre-calculated and stored in a memory. ; Y is 1 to 5 substituents selected from H, halogen, nitro and cyano; Z is halogen, cyano, C1-C6 alkyl, etc. The hydraulic motor communicates with the hydraulic system and is operated in response to a control system. With such a configuration, the widths of the access transistors can be made one-half the width of more-traditional one-access-transistor designs, saving layout space in that dimension.