This is for people who want to have new experience when they ride a bicycle. You can indicate directions by using the remote controller atteched to a handle part instead of taking off your hands from the bicycle. Because the narrow back-view of bicycle make it harder to identify directions, the arrow shape of the indicator can make signal legibility batter with making fun in roads. 

                                                                                                                                                     side view / rear view

<Swing Arrow> is just working prototype not real product. This is consist of components of RC car, leds and the housing part. The housing part was made from RP machine. You can see the making process through the video bellow.  

Making movie