Bicycle 4 Tone Electronic Horn Mountain Bike LED Tail Light Bicycle Multifunction Horn

1. This is a multi-functional product designed for bicycles and simple electric vehicles, Electric horns and night-time warning lights.
2. Life rain-proof design, can be used outdoors on rainy days, easy to install and use, the function is very practical.
3. Mounting ring suitable for 28-30MM diameter handhandle mounting.
4. Material:ABS.
5. Power supply: two AA batteries(Not included).