Be seen from a good distance with this Intelligent Bicycle Brake Safety Light Automatic direction change detection Automatically senses turns and changes in direction and displays a corresponding turn signal Waterproof bike tail light combines regular visual warning with turn signal light and LD beams IPX5 waterproof and dustproof means that the bike light can be used no matter the weather Easy install Features 64-LEDs Comes with 1 x light, 1 x USB cable and 1 x binding  Alert inattentive drivers with this Intelligent Bicycle Brake Safety Light - save 40%