Suitable for diameter: headlight 3.2 cm diameter, tail light 2.5MM inner diameter 

Material: high quality engineering plastic waterproof rubber gasket

Specifications: headlight 0*6.5*3.3 taillight 6.5*4

Instructions for use: One-button control switch on the back, and a clip (clip) on the back. It can be clipped on bicycles, belts or shoulders or backpacks, school bags and other personal items, and it plays a safety warning role to ensure personal safety.

The flash mode is: 

Click: 5 lights long

Second: 5 lights flashed quickly 

Third: 5 lights are slow and flashing

Fourth down - seventh down: 5 lights rolling flashing in different directions 

Eighth: Close