Esonstyle Pack of 6 LED Light Up Band Slap Bracelets Night Safety Wrist Band for Cycling Walking Running Concert Camping Outdoor Sports Designed to give you 360 degree ultra-high visibility in dusk and night time activities Three flashing mode: fast flash, slow flash, and full illumination come with a replaceable battery. you can continuous use after change battery. It takes 1 CR2032 battery available at most major stores. Place Them Anywhere, On Your Wrists, Arms, Ankles.size:large size 35cm*4cm Very bright at night, high visibility protects you,Good for night running jogging, dog walking, concert, camping etc outdoor sports