Colorful Led Shoelaces Having 3 modes:Continuous on,Slow flashing,Fast flashing. Suitable for any kind of shoes, including running shoes, boots and skates. Great for party, 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. Each Shoelaces needs 1pcs CR2032 Cell Button. Lasts up to 30-80 hours. Shoelaces Length:80cm.