... , Back Cameras; 3, 4-way Smart Car Camera control box. Model:CRVS01(3.5" Car 4 Way CCTV System without DVR)3.5" Digital ScreenSIZE 3.5" System PAL ... : one for montor, the other one for DVR or extra monitor;2, Four camer Video inputs to connector Front, Rear, Left ... Feature:170 Degree Mini CCD with Reverse Trigger With Guideline Trigger used for front, rear and sideIncludes:X1 3.5" LCD; X1 4 way ...