The product is a clipon flashing led shoe light which is perfect for running walking or cycling on darker days or at night during the winter. They are a safety light as they will keep the wearer visible to motorists with either a continuous or flashing light setting. They are really easy to use as they just clip onto the back of your trainers on the outside of the heel! Shoe safety clip lights 2 twin pack ultra bright led 2 settings continuous flash requires 2 x cr2030 batteries included run time 70 hours continuous 100 hours flash weather resistant fits most shoes