We have two kinds of flashing shoelace 1.With battery powered -Use button cell 2032x2 -With on/off switch -Length:80cm -Color:red/orange/yellow/green/blue -Wasable tubing and can cut fit all sizes. -Also we use it for costume lighted and party design. -Kids loved them from 6 years old to 17 years old. -Fits any kinds of shoes,such as running shoes,boots,skates,ect. -Awesome and eye-catching,great for parties,night-jogging,safety and all kinds of night time fun! -Can be used as necklace or bracelet,or be worn on your pet or serve any decoration idea! -It is easy to use.Just turn the driver around,you can fasten and unfasten your shoelace. 2.without battery -the same looking as the normal shoelace and no difference seen under daylight -Length: any longth -no any battery needed -Also we use it for costume lighted and party design. -Kids loved them from 6 years old to 17 years old. -Fits any kinds of shoes,such as running shoes,boots,skates,ect. -Awesome and eye-catching,great for parties,night-jogging,safety and all kinds of night time fun! -Color:red/orange/yellow/green/blue