Modohe 4 PACK LED Slap Armband Lights Glow Band for Running - $12.99 + Delivery (Free with Prime/ $49 Spend) @ Newdora Amazon

ONE SIZE FITS ALL: The dimension of Emmabin LED Armband is 4cm x 35cm, 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.

SUPER GLOWING IN THE DARK: 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. You can also wear it for night activity, such as your favorite singer's concert or campfire evening party and etc.