PACKAGE INCLUDES ：1 pair shoe laces(shoes not included), each lace has 10 lights and two CR2032 battery .Durable and bright. It is easy to open the battery case to replace it. SIZE : 0.4''*43.3''/1.0*110 cm, weight for one pair:1.2 OZ/ 33g. Suitable for any kinds of Shoes, including running shoes, boots and skates.Comfortable for kids or Adults. LIGHTING the NIGHT & EYE-CATCHING : Great for Hip-hop Dancing,night sports, night jogging,night activities, weddings, parties like birthdays party, Mardi Gras Party, Halloween party, dance party, Raves & Celebrations, Christmas, outdoor events,holidays ,and for safety and all kinds of night time fun!. Great toys for kids party supplies, Easter Basket Stuffers, school classroom rewards, Easter Party. HOW to WASH : this shoelaces are Waterproof. But the battery case is not, please protect it from water when you wash shoelaces TIPS: In order to prevent the battery power loss, we added the insulating film to the middle of the two batteries. Before using, remember to remove the battery insulation Note: Batteries are included, but sometimes the battery may run out power in the shipping way,if you find the shoelace is not working after you receive it, please replace for a new battery, Thank youSpecifications: Material: Polyester laces Color: RGB Size: 1.0*110CM Weight for one pair ：33g Light source: LED Powered by: 2 x CR2025 button cell batteries for each shoelace Features: Reflective in all side, with multiple flash mode: quick flash, slow flash, permanent bright Suitable for parties, concert or any night time event Suitable for any kinds of Shoes, including running shoes, boots and skates Waterproof,can use in rainning days Please don't immerse it in water