Higo LED Slap Armband, Lights Running, Glow Bracelets Color Box Package ONE SIZE FIT ALL: Higo LED armband with the dimension of 1 1/2"" x 13 1/2"", by simply slap wrap it to fit on both adult and children, men or women for the wrist, ankle, and arm. To apply on the biceps, please consider the dimension to see if it fits on. SUPER GLOW IN THE DARK: this LED Slap band provides 360 degree ultra-high visibility in dark and nighttime activities.That means greater safety for you, your children or your pet from negligent and distracted drivers. REPLACEABLE BATTERY: this bracelets powered by 1 x CR2032 or 2x CR2016 3V lithium small button batteries. Last 50-70 hous, and can replace the battery after used up. Here also enclosed with spare batteries in the color card package. PATENTED TECHNOLOGY: two patents on this model of Slap Armband--Utility model patent& Design patent. As the inventor of this item, with the years of experience, our quality of product can not be compared by the sellers selling products buying from the factories stealing our designs. VERSATILE APPLICATIONS: This glow bracelet can be used to everywhere as long as you can imagined, such as slapping on the arm, wrist, ankle, hair or luggage pole, bicycle bars, dog collars, ect, for runners, cyclists, campers, night dog walkers, auto safety, combine with other safety vest, child safety, runner gear, to keep you safe at night.