Scope of application: applicable to handlebars with tube plug range in inner diameter of 16-23mm;

Installation instructions: tighten the nut and press the rubber ball to adjust the diameter. Then directly into the handlebars into both ends of the hole.

Apply to the environment: turn on the steering light when the bicycle is turning to warn vehicles on the road. Ensure cycling safety. Night cycling is better.
Function: press the white rubber lamp cover to light it up