Alarm effect It has a loud and liquid squeak as soon as you loose hand from the head of duck and then air enters into duck?s body so that the sound can alert pedestrians to move on to other way. If you press it many times, pedestrians will pick up their pace to move away. Safety and convenience If you have a ride or drive a car when darkness has fallen, you can press the button on the side of duck?s body and then bright yellow light will be appeared. The muted and warm bright light can light up the way ahead and people will know you then make way for you. Stetch belt It is flexible and can be installed on all kinds of sizes handlebar. The belt has good stability so the duck bell can be kept a long time on handlebar. And because of the rubber material of duck bell, it is hard to be damaged. Wide application It has a variety of installation mode, such as car handle, bicycle and electric bicycle handlebar and doorknob. An duck bell can be used in different scenes so it can help to save cost. What?s more, the unique style can add to the pleasures of life. Weight: about 30g Package:2*Duck bike bell