CatEye: Our auto taillight produced with built in reflectors that exceed international standards. The Reflex Auto will automatically turn on whenever both darkness and motion are detected by the motion and light optic sensors, providing the rider safety both while the light is turned on and while functioning solely as a reflector. Simple & easy to fit to your bike. The OptiCube™ lens technology ensures that you get a highly visible rear light & reflector in one. A versatile light that also comes with a rear rack bracket. FEATURES:The Reflex Auto will automatically turn on whenever both darkness and motion are detected by the motion and light optic sensors, providing the rider safety both while the light is turned on and while functioning solely as a reflector.5 LEDsGreater than 180 degree visibilityAutomatically turns on / off by light and motion sensorsEmits light for 50 seconds after the bike stopsBuilt-in reflectors that meets highest government standards (USA, Great Britain, Europe and Japan)OptiCube™ lens technologyAAA alkaline battery x 25 modesMode memory functionSP-5 bracket (ø21.5-31.8mm) and Rear rack bracketWeight 82gDesigned in JapanRUNTIME:Constant mode:30hrsFlashing mode:100hrsRapid mode:60hrsLong-life mode:120hrsPulse mode:30hrsTECHNOLOGIES:Auto Light Auto on/off controlled by motion & optical light sensors to automatically turn the light on when darkness of motion is detected.ReflectorOur reflector technology exceed the highest government standards around the world.Opticube™ Our proprietary OptiCube™ lens technology maximizes brightness for greater visibility.Side VisibilityProvides visibility from the side to increase safety.All WeatherCan be used in rainy weather.