Features:100% brand new and high quality.Made of durable ABS.Suitable for handlebar diameter about 2.0-2.5cm.With more than 90 db sound, a loud siren to draw people's attention on streetKeep your kids from danger by warning or noticing othersEasy to be fixed on the bicycleSpecification:Color: Black, White, Blue, RedMaterial: ABS plasticSize: 52*53*73mmBattery Supply: 2 x AAA Battery(Not Included)Package Included:1* Bicycle Bike Electronic Horn