ITEM NAME:Cycling Bike Bicycle Mountain Road Bike Electronic Super Loud Bell Horn Beetle Descriptio n Features: 100% brand new and high quality Easy to install,very convenient Small and exquisite appearance,portable and practical Suitable to install on the handlebar diameter of 2-2.5cm bicycle Specifications: Case material: Plastic Color: Yellow Size: Approx. 2.17*2.17*1.46inch/5.5*5.5*3.7cm Mounting hole diameter: Approx. 0.79*0.98inch/2-2.5cm Package included: 1x Electronic horn 1x Installation Holder 2x R1 Battery Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality buy, happy buyï ¼ Yellow UFO Shaped Bike Bicycle Cycling Plastic Electronic Alarm Loud Bell Horn.Yellow UFO Shaped Bike Bicycle Cycling Plastic Electronic Alarm Loud Bell Horn. 1x Electronic horn. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. 1x Installation Holder.