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).
