Featuresr controlled by the exclusive mobile phone app no need to be programmed by computersr download a variety of pictures gifs or upload your own pictures and diy your own texts pictures and gifs to display on your bicycle wheel as you wantr the app will monitor your riding speed maximum speed and record your journey time and mileage etcr ip55 waterproof coated led design no need to worry about rainy days39 riding and damages caused by normal bicycle washingr powered up by a b