The obsolete low-resolution Safety Vision DVR was mounted on the radio box a long time ago. The modern Low Cost HD School Bus Child Safety Camera systems offer high-quality images at a low cost. Still keep in mind is always best to invest in 100% Solid State digital like the SD4 series, small DVR mountable under dash where it will not present a hazard to driver or children. Those wishing to opt for the best can choose the Professional Industrial Grade School Bus Camera solutions offered in the SS4 series.