Flammi LED Nylon Shoelaces Light Up Shoe Laces with 3 Modes in 5 Colors Disco Flash Lighting the Night for Party Hip-hop Dancing Cycling Hiking Skating--only shoelaces for sale Two light emitters and two 47" real laces included in a single set. Suitable for any kinds of Shoes, including running shoes, boots and skates. Batteries are included, lasted for 70 hours. 3-Mode Function - Solid, Slow Blink, Fast Blink. Real shoelaces are easier to be tied.