Package: 1 pair Size: each shoes laces 120cm length (about 47 inch) Powered by: 2 x CR2025 button cell batteries for each led light up laces , Batteries are included. Instruction for Color-Changing Shoelaces: 1.Please remove the white insulating paper from the battery before use and insert it again after use to extend the battery life. 2.Press the white power button on the side for different light settings and also to turn off the power. 3.When the batteries run down,you can replace new. Please Kindly Notes: The glow shoelaces is Waterproof,can use in raining days,But Please dont immerse it in water .