The dimension of Velkur Basic LED Armband is 34,2 x 3,3 x 0,2 cm, it fits on both adult and children, men and women, by simply slap wrap it to different position, such as wrist, ankle, and arm. If you want to use it around the biceps, please check the dimension to see if it can fit on.
Adjustable for ANY SIZE: The elastic band makes it easy to adjust for a loose or snug fit.
This LED Slap band provides 360 degree ultra-high visibility in dark and nighttime activities.This provides great safety protection for you, your children or your pet from negligent and distracted drivers.
REPLACEABLE BATTERY:Each Armband comes with 1*CR2032 3V small lithium button batteries which can work for about 50-70 hours. When the battery is exhausted, you can replace it with a new one.