Led color: red,yellow,green,blue Material: PU High conductivity glass fibers Battery: 2pc*CR2032 per pair ... Led shoelace description Size: 80*3cm material: TPU+ABS color: red ,yellow ,green,blue Flash model: ... Control, flashing, fast mode flashing, slow mode flashingUSE FOR: skating, outdoor sports, running at night, fetival events, concerts, promotions led lights for shoes