The invention relates to a rear-view mirror for vehicles, which consists of compatible, combinable and exchangeable modules such as: (A) and (B), or integrated (A+B), functional, signal, lighting and sensor modules, and structural (C), (D) and (E) modules; cover-housing, body-housing and support which may include functional modules. (A), (B) and (A+B) fulfill their function even if the rear-view mirror is folded. They use a multifocal light source of LED's inserted into a flexible and orientable circuit and/or a mixed rigid-flexible circuit-combining LED's+bulbs and other lighting elements, with variable optical and reflective means enabling more than one signal from one same transparent surface with direct light output, indirect-reflected light output and/or through intermediate optical light guides depending on the directions required in the front, the side, the back and the lateral ground for different commands, applications and safety signals.