Muth Mirror Systems' Signal Mirrors help prevent accidents. The directional activates a red or amber flashing chevron Through-The-Glass of the corresponding Signal Mirror to alert drivers in the "blind spots." When hazard lights are used, signals flash in both mirrors. The Brake Module upgrade adds a steady-on signal in both mirrors and the MultiFunction Module upgrade adds other innovative options to Signal Mirrors. There are hundreds of vehicle and motorcycle specific kits and for virtually any vehicle the Wide Angle Signal Mirror is available.