Flammi LED Shoelaces Light Up Shoe Laces with 3 Modes Flash Lighting The Night for Party Hip-hop Dancing - Type A 2 x light emitters and 2 x 32'' fiber optic laces included in a single set 3 light modes: Stay on, Normal flash, Fast flash Suitable for running shoes, boots, skates, etc. Endless applications - Mix and match colors, link multiple units in a chain for use as a bracelet or necklace Button cell is included, last for about 70 hours in "flash" mode and about 30 hours in "stay on" mode