Electronic Super Loud 6-sounds Bicycle Bell Bike Horn Siren Ring Alarm SpeakerSpecifications:Material: PlasticColor: BlackFits Tube Diameter: About 22mmWire Length: 220mmSize: 8.8cm x 4cm x 5.4cmFeatures:Brand New Electric Bicycle Horn.With 6 different and loud sounds， increase the safety.Loud and effective electronic horn.Sound button is very comfortable and sensitive.Power is 9V battery included for long time use.Fine workmanship and waterproof.Easily install and fits all kinds of bicycle whose hand-bar diameter is 22mm.Great for town and city riding where audible presence is required.Fits all handlebar types and sizes and is easy to fit.Package Included:1 X Electronic 6 Sounds Cycling Alarm