COFFLED&reg;1pair LED Light Up Shoe Shoelaces Flash Glow Stick shoestring for outdoor sports green They are shoelaces but not normal ones, because they could light up and flash!Ultra bright and eye-catching.Durable, waterproof and washable glass fiber as material.Suitable for almost all shoes with shoelaces, such as board shoes, roller skates, sneakers, etc. Let you stand out in party, KTV, bar, prom, dance.Especially ideal for night. Install 1x 3V CR2016 button cell battery into each control box.Lace up your shoes with these 2 shoelaces.Insert the top of each lace into the 2 holes of the control box, switch the lock to "lock" Modes: Long light/fast flash/slow flashPowered by: 1 x 3V CR2016 button cell battery for each control box Shoelace color: TransparentShoelace material: Glass fiberControl box material: ABSControl box size: 5.8x3.0x1.9cmLength: Approx. 80cm Net weight: 42g