1Helmet corner can be illuminated,Suitable for almost any helmet with a smooth surface (please note that this item does not contain a helmet). 2It is resilient, durable, and will not scratch the helmet. 3The suction cup with double-sided adhesive protection is not easy to fall off. 4Removable silicone suction cup, easy to install and disassemble. 5The suction cup can only absorb flat and smooth surface. For matt helmet or gap, only double-sided adhesive can be used. 6Package Included:1x horn (If you want a pair,you need buy 2) Specifications: [Product name]: helmet Corner can be illuminated (single pack) [Product material]: ABS plastic [Product color]: colorimetric; white; red; pink; yellow [Product Features]: Separate structure; no helmet damage; luminous design [Product application]: helmets; bicycles, motorcycles, etc. Package Included: 1*horn 1*base 1*sticker 1*USB charging cable