Lace Length: Approx. 31 1/2 inch / 80 cm
Driver Size (L x W): Approx. 2 1/4 x 1 1/8 inch ( 6 x 2.8 cm )

Features:

With lithium CR2032 button batteries(not include), which can keep on flashing for about 70 hours
Having 3 modes - normally on, slow blinking and fast blinking
Emitting colorful lighting
Suitable for any kind of shoes, including running shoes, boots and skates
Great for parties, night jogging and all kinds of night time fun
Can also be used as necklaces, bracelets for Halloween, Christmas, New Year, etc.
A waterproof, washable, durable and safe gift for children and teenagers over the age of 6

How to use:

Fasten the lace onto your shoe
Insert the ends of your lace from the hole underneath the driver
Insert the ends of the lace into the holes on the side and turn the switch to the 'lock' position
Press the central button and you get a pair of fantastic, flashing shoe laces for your party