Meco Gub M58 Self-Powered Lighting Set Electromagnetic Induction Not Battery Bike Rear Light Disc Brake Bicycle Light

Specification: Size: 36*32*25mm Weight about: 32g Principle: Electromagnetic Induction Battery: Self-powered, no Battery Light Color: Red Application: Fit for disc brake bike used only, installed between frame tail hook and quick release. Notes: the self-powered light is workable when the wheels twirl quickly, the light is not lit when static. Package Included: 1 x Self-powered Lighting