5 LED BUILT-IN REFLECTOR TAIL LIGHT: 1 super bright Opticube LED, and 4 red LEDs with Built-in reflectors that meet the highest government standards (USA, Great Britain, Europe and Japan).
AUTO TAIL LIGHT: Set it and forget it; The Reflex Auto will automatically turn on whenever both darkness and motion are detected by the motion and light optic sensors. *Note that auto mode does not work for daytime use.