The product has passed CE, ROHS, EN471 certification, water, cleaning removable electronic parts. The product is suitable for walking the dog at night or dark environment, outdoor and pet movement, through the ultra-bright fiber optic light, from a warning, while expression of individuality and fashion.Material: nylon webbing ,Fluorescence webbing ,super bright LED,Optic Lighten FiberFlashing Mode:Quickly Flashing / Slowly Flashing / Lighten up (controled by the button) 2PCS CR2032 button battery60-80 hours, normal 4-5 months; battery can be replaced.