Best Sports accessory for runners and any outdoor activity such as running, cycling, walking, jogging, biking, motorcycling, dog walking, rollerblading, hitchhiking, work on the construction site, traffic safety, etc. Highly reflective at night and highly visible in the day strongly enhancing your safety. Lightweight, with high-light LED, enhancing the visibility. Also a best decoration for your bag. Two lighting modes: Fast flashing and steady on.