Guiding line car camera show the distance as reference (XY-1228L) The camera with the distance line help rear view parking more easily . CCD camera profomance.Very good pictures. Special image sensor for auto mobile,against extreme hot and cold weathers. Features: night vision,waterproof,shockproof, guiding line Comply with the original cameras of the high-end automotives, with software control and backing direction, with 6 IR led inside for night vision. Waterproof design. Wide view angle of 120?150? Reversing line to tell drivers the exact distance.