Featuresr bicycle handlebar end with signal light function sporty and trendyr aluminum alloy and abs material strong and durabler features red light for high visibility in the dark and low light conditionsr easily switch in 3 modes constant slow flash fast flashr each light runs on 2 cr2032 batteriesr ipx 6 waterproof you can ride in the rainy day as usualr ergonomic design easy to grip firmlyr easy to install on the bicycle with 222mm handlebar diameter