Loudon purchased our affordable school bus camera or vehicle camera surveillance system installation. At the time this DVR was one of the smallest available.  Now this school bus video or vehicle camera system DVR is 4 times larger than some.  For most applications of school bus cameras, digital bus video cameras, vehicle camera, mobile video surveillance systems, digital in-car video camera, in-car camera, bus camera surveillance, the best value is 100% Solid State School Bus Camera like the SSD Industrial Grade School Bus Camera or SD4 series.